Climb Every Mountain BUG

I’m stuck with this quest. “Climb Every Mountain”
One rock is missing so I can’t climb up. When I abandon the quest my UI is still the one from the climbing quest and I can’t do anything, Not mount, no hearthstone on anything that I can use. Relog wont help and even making a ticket fails. Anything that does work?
This is the first expansion with this many gamebreaking bugs.

Edit - found out how to get out of the climbing IU by unclicking the climbing gear icon in the buff frame. Normaly you have a red arrow icon to get back to the normal IU.

A gamebreaking bug is when it crashes the servers for everyone not only 1 player. I recommend to report the broken quest though, according WoWhead more peeps got trouble with it.

Magical In-Game Bug Report

CS doesn’t handle nor forward bug reports: We submit bug reports through the In-Game Bug Report in the Europe Region.
Reports submitted in this fashion will not receive a response. Instead, they’ll be directed to the teams responsible for addressing them.

To report a bug in-game:

  1. Press Esc or click the ? button to open the menu.
  2. Click Support.
    2.5 Note: Do NOT use search bar or click “Contact Support” links.
  3. Click Submit feedback or bug report, the middle button in the row with the Anub’Arak bug/insect icon.
  4. Enter the details of the bug into the Submit a bug description box, making sure to follow the guidelines outlined on the submission form.
  5. Click Submit.
    If prompted to go to US Bug Report forum, go back to step 2.5