Ao tentar gerar Uma apk assinada ele apresenta esse erro:

Information:Gradle tasks [:app:assembleRelease]     Warning:butterknife.internal.ButterKnifeProcessor: can't find superclass or interface javax.annotation.processing.AbstractProcessor     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.AbstractProcessor     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.ProcessingEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.Filer     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.tools.JavaFileObject     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Modifier     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ElementKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeVariable     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.ArrayType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.DeclaredType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.util.Types     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ExecutableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ElementKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ExecutableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ExecutableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.VariableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.DeclaredType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ElementKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.SourceVersion     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced field 'javax.annotation.processing.ProcessingEnvironment processingEnv' in program class butterknife.internal.ButterKnifeProcessor     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.ProcessingEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.tools.Diagnostic$  Kind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.Messager     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.util.Elements     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.PackageElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.AnnotationMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.AbstractProcessor     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.DeclaredType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ExecutableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.VariableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.ProcessingEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.Filer     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.tools.JavaFileObject     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Modifier     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ElementKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeKind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.util.Types     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.SourceVersion     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.tools.Diagnostic$  Kind     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.Messager     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.util.Elements     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.PackageElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.tools.Diagnostic     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.util.Elements     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.util.Types     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.Filer     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.ProcessingEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.tools.JavaFileObject     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Modifier     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeVariable     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.ArrayType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.DeclaredType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeVariable     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.annotation.processing.RoundEnvironment     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeVariable     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.VariableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.ExecutableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.VariableElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.DeclaredType     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.type.TypeMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.SourceVersion     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.TypeElement     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.AnnotationMirror     Warning:butterknife.internal.ButterKnifeProcessor: can't find referenced class javax.lang.model.element.Element     Warning:okio.DeflaterSink: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement     Warning:okio.Okio: can't find referenced class java.nio.file.Files     Warning:okio.Okio: can't find referenced class java.nio.file.Path     Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption     Warning:okio.Okio: can't find referenced class java.nio.file.Path     Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption     Warning:okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement     Warning:okio.Okio: can't find referenced class java.nio.file.Path     Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption     Warning:okio.Okio: can't find referenced class java.nio.file.Path     Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption     Warning:okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement     Warning:there were 252 unresolved references to classes or interfaces.     Warning:there were 1 unresolved references to program class members.     Warning:Exception while processing task java.io.IOException: Please correct the above warnings first.     Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.     > java.io.IOException: Please correct the above warnings first.     Information:BUILD FAILED     Information:Total time: 10.397 secs     Information:1 error     Information:188 warnings     Information:See complete output in console