Grimhaven Map, locked out of boss fight.

End of grimhaven map, Asinia, The Praetor's Consort is the boss. A minion ran ahead and aggroed her while I was adjusting a support gem. The area is now locked out and blocked by the "red wall". I have teleported out to hideout and back in. Teleported around the map using checkpoints. Nothing. I can't access the fight and the map is not able to be completed.

Same accidentally aggroed boss, and switched support gems. Now am lock out of boss arena.