I have the same issue. Reading your post, we ran parallel troubleshooting paths. No joy.
Half baked launch. Hit me with the update @ptillisch
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Hi @thestandardsir. I apologize for the inconvenience. Please follow the instructions here to update the operating system image on the UNO Q board:
https://docs.arduino.cc/tutorials/uno-q/update-image/
That should resolve the problem that causes the App Lab update mechanism to fail. After this update using the procedure described above, you should be able to use the standard App Lab update system from here onward.
If you have any questions or problems while following those instructions, just provide a detailed description of what happened and we'll provide further assistance.