Yeah no result from hiding and reverting again…
And yes, that seems to be the only option left. Let me try that real quick.
Is there more than one Simpson’s folder? Check all three drives, F:, I: and J:.
No that wasn’t the case, I always keep my series in the same folders, not spread out on multiple drives.
But alas, the Plex Dance worked. Thanks @pshanew for the solution and @OttoKerner for the initial attempts
I moved all of the affected seasons to the drive root folder, where plex can’t see them. Scanned library files, moved them back in and scanned library files again. And there they came without the trashcan logo. But I do wonder how they got and kept the unavailable logo in the first place.
Did you ever move them from one drive to another?
At least it’s fixed. 
I can’t remember but I probably did, still a weird error though.
No problem, glad it worked.
I know this post have been solved, but i will just give my input for future refence. I experienced the same problem as you, and found out that it was actually a single episode in my season that had 2 paths (one which didn’t exists anymore) that made the whole season show as “unavailable”. I deleted the faulty path and the “unvailable” banner for my season went away. So if anyone experiences this, try checking the “get info” details of every episode in the season first, if you do not want to do the “Plex Dance”
