Help With Fallen Delivery Quest

I tried looking at a guide but the layout was completely different, so I looked around and found a bookcase that I could move, but after I go to the black warp area the Office Manager kicks me out. I don't know what I'm supposed to do.

Edit: doing /class outside of the door fixes it, but doing /class inside the door locks you in.

 

did you give the note do the guy in house 3 in cinfras? if you havent thats prob why , i had the same problem and did /class and that worked and office manager let me in

 

i had the same problem
for me i turned my render distance down to 2
ran like 4 chunks out
then disconnected, switched lobbies and ran back and it was fixed