Thanks, .
As a troubleshooting step, I actually tried exporting the blue character to fbx, then i opened it in 3d . Without making a single change, I exported everything back out to FBX saving it as NCHeroTPP.fbx and tried to re-import into Unreal. I get an error message "Failed to import ‘…/…/…/…/…/…/3D/UnReal/TIGO/3d models/NCHeroTPP.FBX’. Failed to create asset ‘/Game/Character/NCHeroTPP’
Then in the message log after the failed import, I get “error, could not import HeroTPP, duplicate bone name found (‘HeroTPP’). Each bone must have a unique name.” and a second error saying “Multiple Roots found”.
I thought it was maybe because I already had a HeroTPP skeleton mesh in the file, so I deleted it and tried to re-import but I get the same error messages.