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[TheDreadPirate]

I cannot make heads or tails of what you have or have not done. So I can't really give you advice on what to do to get back to where you were.

If you want to set a profile picture you go into the user control panel and "change avatar".

https://forum.jellyfin.org/usercp.php?action=avatar

It does NOT have to be an actual picture of you. For example, I am NOT a cute little rubber duck with a pirate hat.