Doesn't work on Multi-Site

On ticket submit form:

Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php
POST https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php 500 (Internal Server Error) jquery.js?ver=1.10.2:5
POST https://blog-dev.uwgb.edu/360-of-change/wp-admin/admin-ajax.php 500 (Internal Server Error)