I have installed GEOS, GEOPHP module, GEOFIELD module, OPENLAYERS module and all the accessory required modules successfully in drupal 7.5.6. Using PHP 7.0, Apache2 in Ubuntu 17. As mentioned in tutorial and in many questions, added ; GEOS extension extension=geos.so line in etc/php/7.0/apache2/php.ini and all the places wherever php.ini exists. Status report shows all perfectly installed and configured . I clicked on ‘Rebuild permissions’ also as mentioned in one of the comments. After all these try, when clicked on Admin>Structures>Openlayers, no map is rendered . Checking Load javascript debug integration files ? checkbox is displaying accessory tools but not the map (only white screen shown). Please help me with this problem, I will be grateful.