This is a thing with the new system. Champs on defense are locked out of AQ even if there is no war going on and the system is shut off.I’m still not clear if they intend for the champs to be locked out of AQ when the new system is fully functional, if it’s a bug they will fix, or if it’s a weird quirk they can’t fix.
It’s not clear. It says “can still be used in Solo content” and I’d consider Alliance Quest “alliance content” so I don’t know what they intend.