I've had a character for a while now on a campaign who was once part of a campaign but left due to a mistype a long while back. For a long time it was fine, but as I was handed more magic items I've had to homebrew all of them myself, as I cannot add the character to any campaigns at all. All my other characters are fine, but it's just this one character I've had difficulty with. They're level 14 now and remaking them from scratch would take forever to do. Why can't they be added?

For reference, tried using join links to a variety of campaigns. All other characters were viable or recognized as part of a campaign except this one sheet.

https://www.dndbeyond.com/characters/97289490/1uT6ui

Support would be appreciated!

Was the character in a campaign that got deactivated or deleted with that character still attached to it?

No. The campaign is still there. 

It may still exist, but was it “deactivated?”

I don't believe so. It's still taking new characters. It's a west march and none of my other characters have had that problem.