Memory Error

We are having an issue with a memory error after you submit a ticket.

https://leo-only.org/contact-us/

Any help would be appreciated.

https://wordpress.org/plugins/wpsc-support-tickets/

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 72 bytes) in /home/leoonly/public_html/wp-includes/widgets.php on line 90

The error does change is not always the same files.