Hi @melliesou
When it broke my site, I saw this:
Warning: This plugin has not been tested with your current version of WordPress.
So I thought that’s why. I’m on WP 5.2
After I updated to WP 5.2 a week ago, I received complaints that people cannot access the plugin to write or read responses to their tickets, as it tells them just “page not found” or a blank page, or even 401 and 500 errors.
So I checked it out and found that my template also sometimes is showing then missing.
I myself could not even access the admin area, and had to rename the folder to deactivate it. That was the only way I could access admin area.
So once inside admin, I renamed the folder back to original, and could deactivate it from admin area.
Once deactivated, my site is accessible without problems. Then I activate the plugin again, everything seems to work, for about a few hours, and all of a sudden, same old same story all over.
Thats when I checked and saw: Warning: This plugin has not been tested with your current version of WordPress. under plugin details, and thought that may be then the problem.