I hope you can help with issue. I tried re creating some screens and I have the same issue. For example I will delete the app bar, add a new one, and see if anything changes, I get the same issue @material componenet not found!
Okay, I just sent in a ticket. I refreshed the page, tried re-adding components, cleared cookies and cache, re-logged in. All the same issues. I have a few other test apps that are all broken as well.