Unknown App errors

This the sort of error you get when you have edited apps.

This - which is why I asked if you're using https://banglejs.com/apps

If you had your own local app loader and you merged in the recent changes, chances are there could have been merge errors as there were some big changes to apps.json - and those merge errors might have made the JSON invalid. All you need to do is run npm test locally and it'll tell you where the error is