Error 500 on upgrade from 2.1.13p1 to 2.3.1
After copying the new files over the old ones, it completely breaks with Internal server error. This happens with /utility/update as well as the main forum URL.
I can't find a php error log file, only an older one from before the upgrade. Where would the log be?
Things I've done:
- Checked that it has PHP 5.4
- Deleted the /cache contents
- Checked there's no /themes/mobile/views/discussions/helper_functions.php
- Deleted /applications/dashboard/views/default.master.php
The upgrade instructions say to update .htaccess but which one and make what changes?