Since updating to Sulu 2.2.2 the Assets/Media Section in the admin crashes after it loads. It is just a blank screen with some js errors caused by some mbox.js usage. All other sections are OK.
(Happens in all browsers)

Is it possible that you have not updated the build of the administration interface when upgrading you application?
You can do that by using the bin/console sulu:admin:update-build command:
https://docs.sulu.io/en/2.2/upgrades/upgrade-2.x.html
YES, that's it 馃槂
Thanks a lot for the awesome response time and the fix
Most helpful comment
Is it possible that you have not updated the build of the administration interface when upgrading you application?
You can do that by using the
bin/console sulu:admin:update-buildcommand:https://docs.sulu.io/en/2.2/upgrades/upgrade-2.x.html