@KRONICRAGE Sorry to hear you're having trouble with your My Thumbs Up playlist.
I do see that your account is currently upgraded to Pandora Plus. My Thumbs Up playlist is a feature that's only available with Pandora Premium.
That said, I do see you recently enabled a Pandora Premium Access session on 7/29, which temporarily unlocked Premium features, including your My Thumbs Up playlist. Once that complimentary session ended, your account automatically returned to your regular Pandora Plus service.
My Thumbs Up playlist will not show in your collection now that your account is back on Pandora Plus.
To clarify, were you having trouble listening to your My Thumbs Up playlist while you were in your Premium Access session?
If so:
The more details you're able to provide, the better equipped I'll be to help. I look forward to hearing back.