[2023] PC-EU. Disconnected from server when trying to enter Broken Tusk delve

When I try to enter Broken Tusk delve in Shadowfen every time I get disconnected from the server. I tried to enter this delve with different characters, but no chance. And now I'm stuck with Sharp-as-Night quest "Dim and Distant Pasts".
Fix this issue please. PC-EU megaserver.