Warning: set_time_limit(): Cannot set max execution time limit due to system policy in /customers/5/5/9/site.com/httpd.www/wp-content/themes/……

Cause: hosting restriction on shared servers.

Help: Hosting must provide the solution based on this url instructions http://php.net/manual/en/function.set-time-limit.php

Alternative solution:
If hosting cannot raise that limit, one option is to change hosting.

In the theme – you can try to comment line 7 in user-dashboard-add.php and test submission.