"instance is full" bug! Urgent!

Got invited to already existing group(through RDF) with voted off person.
Couldnt get into dungeon because it said "Instance is full". Now im bugged...
Cant sign up for any RDF, cuz im in "party" with offline person. Actually im not in any kind of party, aswell cant invite or get invited into any group.

Tried out these wings(which doesnt help):
Relog
Log off for 30+min
/Reload UI
Enter and exist any dungeon
Invite other people into party
Invited by other people into party
Unstuck(on website)

/run LeaveParty()

paste this in your chat

Thanks mate, it helped.