I am not able to open Word documents using Office Web Apps. When trying to open it I’m getting this error-

I have run ULS logs on OWA server.

ULS Logs-

WOPICheckFile,WACSERVER BadRequest [current url:http://server:43616/_vti_bin/wopi.ashx/files/678676d7d0b1410b866f089695bf2481?access_token=REDACTED_1050&access_token_ttl=1472504532529]

WOPI CheckFile: Catch-All Failure [exception:Microsoft.Office.Web.Common.EnvironmentAdapters.FileUnknownException: WOPI 400
at Microsoft.Office.Web.Apps.Common.WopiDocument.LogAndThrowWireException(HttpRequestAsyncResult result, HttpRequestAsyncException delayedException)
at Microsoft.Office.Web.Apps.Common.HttpRequestAsync.End()
at Microsoft.Office.Web.Apps.Common.WopiDocument.GetWopiRequestResultWithRetry(Int32 maxSize, MemoryStream ms, WopiRequest wopiRequest)
at Microsoft.Office.Web.Apps.Common.WopiDocument.CheckWopiFile()]

WOPI CheckFile: Catch-All Failure [url:http://server:43616/_vti_bin/wopi.ashx/files/678676d7d0b1410b866f089695bf2481]