CAMP TIX Error

WE’re attempting to use the plugin to sel tickets to an event. However, When I use the short code. [camptix]it simply throws an error message. I need help troubleshooting it further to determine what we’re doing wrong. WE’ve used it successfully on another site without issue.

Here’s a link with the error message on it:

https://www.ads-software.com/plugins/camptix/