reset the cc desktop app: make sure it's in the foreground, then press:
Win: Ctrl + Alt + R
Mac: Cmd + Opt + R
I had a similar issue.
Make sure that you have all Windows updates that are available.
The one thing that was causing it for me, believe it or not, was that I needed to do a clean installation of the latest Studio graphics driver from the NVIDIA website. After doing that and restarting, all was OK.
Its' solved ?
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Restarting my Mac solved it for me
I tried that and it didn't do anything