Node red dashboard 3.1.7

Hi, I have upgraded my dashboard node from version 2.25.0 to version 3.17 and all my UIs no longer work. The buttons for example no longer appear on the dashboard and I can't group them either. Any ideas??

Which versions of nodejs and Node-RED do you have installed ?

Node-RED version: v2.2.2
Node.js version: v15.3.0

Any errors in the browser console?

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