My previous ticket is https://premium.wpmudev.org/forums/topic/cant-activate-add-ons.
It's been 4 days that I haven't got any response from your team. I guess there is something wrong with the ticket so I open the new one.
Right now, I installed Jobs&Expert plugin on directory.forchurch.net and test.dotbookstudio.com, both site run on the same server.
The plugin work fine on test.dotbookstudio.com but on directory.forchurch.net, I can't activate the add-ons. You can watch the clip to see what happen. https://youtu.be/3llRaRl-jT0
Thanks and Regard