Cannot add device in CMS, edit device window remains visible after "Save" button is clicked

I’m having a bit of trouble adding an android device to the CMS.

After registering the device on the android app I go to:
Displays,
Edit,
Licence Display? —> “Yes”
[Save]

The gear icon keeps spinning and the changes are never saved.

Anyone else having this issue?

Edit: the only way I am able to enable the display is by sending SQL queries. This issue also affects the schedule now page.

Edit 2: I’m getting a 500 internal server error for [domainname]/xibo/index.php?p=schedule&q=ScheduleNow&ajax=true

looks like an issue with your web server.

Could you enable debugging on Report fault page in CMS then recreate the problem (try to licence your display), then check logs page for errors?