Can't retire character from retired game

I'm trying to retire my character Mazzy Fentan from Serpent's Skull. I saw a thread from a year ago with a similar problem but no useful advice. The only place I see to retire the character is from the "Edit" tab on the character's page. I'm reluctant to leave the campaign or delete the character, but the "Retire" link just reloads the character's "Profile" tab.