Cannot run Trial of the Champion (Heroic) at all

Permanently instance locked out of Heroic Trial of the Champion despite daily reset. I check the social tab to see that the lock has expired every day, and every day when I enter the instance it tells me to wait until tomorrow’s lockout. It’s been expired for nearly a week yet I cannot start any of the fights; nothing loads in even if I reset instance. I’m also unable to manually reset Mythic dungeons (not for loot, just achievements), might be related. I just want to farm Champion’s seals.