Issues after upgrading to PHP 7.0

Hi,

I recently upgraded the PHP to version 7.0. After that, I'm getting lots of issues.  My webmail stopped working. (etc/apps/webmail/?_task=login) and WordPress sites not functioning properly. I'm getting file_exists(): open_basedir restriction in effect error, and media library not loading any of the sites. So, Is Sentora not compatible with the PHP 7.0.18-1+deb.sury.org~trusty+1 ? Can anyone help to fix these server issues? Please note I'm new Sentora and this is my first VPS server.

Thank you very much