[Bug Report]
We have confirmed reports of some users, depending on their PC specifications, being unable to enter their Seliana rooms or other players' public rooms after updating to Ver. 11.50.00.
This issue only occurs in the first online session you create or join after booting the game.
If you are having this issue, please try the temporary solution below while we continue to look into a more permanent fix.
■Temporary Solution
If you encounter this issue, go to any quest counter, select "Online Session", and either create or join a new online session.
Important:
Matchmaking in Monster Hunter World: Iceborne requires players to have updated to the same version. Keep in mind that you can only match with other players who have the same update. You can verify the version number in the bottom-right corner of the title screen.
For other questions, please visit the official Monster Hunter World: Iceborne support portal below.
http://www.capcom.com/mhwsupport/