bug/bugs change party and brighthollow

hi there,

my game has developed some glitches.

i can't change my party, i dismissed a few and recruited some others but it didnt change the party.

at one point i only had the 3 members that i didnt switch left.

another thing is that simultaniously, i can no longer acces the sencond floor at brighthollow.

whenever i try i get thrown out of the game.

is there anything i could try other than switching between saves?

any advice would be much appreciated.

thanks