I also got the same issue and posted the question on Reddit. Pandora had been working flawlessly on my Logitech UE and Squeezebox devices until a few days ago. The last thread on this topic in 2020 seemed to imply whoever posted it got a resolution at that time. However it's 2022 and it looks like the ping pong match between Pandora and Logitech legacy devices has reared it's head again.
I smell either engineered obsolescence , accountants or lawyers at work.
By the way, I did a factory reset, synched my UE Radio with their website at Logitech, no dice. Same result with the licensing message popping up. I find it ironic Logitech still has Pandora listed as a service on their website. Perhaps they didn't get the Pandora memo for 2022.
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