We have a known issue with the new build of the Shadowlands Beta that is going up today. Players in a group may encounter an issue when queuing for Torghast.
When you encounter this bug, the “Climb” button for queuing will displays an error that reads, “Please gather your party before queuing.”
To avoid this issue, form your Torghast party before entering the Torghast portal.
If you’re already in a group, this issue can be resolved by remaining grouped, exiting the Torghast lobby, and re-entering the Torghast portal. Doing so should display a red button for “Climb”, and the party leader can now queue the group.