Cannot interact with the tabard designer in Darnassus. The other tabard designers are fine. I opened a ticket and they said there has been no reports of this issue when i have seen multiple reports. As i watched others report the exact same issue while we were streaming on twitch.
You cannot interact with the Darnassus tabard designer. I have personally disabled all addons, restarted game, re-installed game. This is a developer issues and should be looked into ASAP as people do not have 5g for a port to Stormwind or Ironforge.