5
Humm, the one from /modules/AMS/notification_update.php is calling /include/notification_update.php
So there are two files with the same name involved. Any idea of the location of the missing file?
Verify your XOOPS upload with the file check (see release notes) to see if there are missing files.
Other possibility is an incorrect specification of XOOPS_ROOT_PATH (physical path) in mainfile.php