I am new to using Drupal CMS and am having a difficulty regarding backup restore. I created a new server to restore the backup I do manually (dump Postgres and copy the directory inside apache).
The server is an ORACLE Linux 7.3, APACHE 2, Postgres and drupal
I usually backup and can restore, but the following message appears when I open the site, which loads normally.
Warning: chmod (): Permission denied in event_css_add () (line 272 from /var/www/html/com9dn/sites/all/modules/event_calendar_colors/event_calendar_colors.module)
I can not use this module, and I can not install any modules anymore.
I've manually set the permissions on the original server and nothing has changed.