DeltaUmbreon

After the cut scene when Madelis talks to Cassandra about the group being in Grand Dream City (after the battle with Venam for the bow), I left the building instead of going to the penthouse to join the others, and now every time I enter the building it brings me to Cassandra's office and my sprite is invisible. I can leave there but every time I try to enter the building with the penthouses it brings me back to Cassandra's office and I can't continue the story/game.