After tonight's server reboot (probably unrelated but noted) discovered a level in the Coral Phantom Gate - Deconstruction Zone Radioactive Recycling, had been generated without any Exit Elevator, and appeared to instead have 2 Entrance Elevators.
(screenshot of this provided)
I'm stuck too... The party buttons on the other side of the gate and the exits right there...
There's also another bug where there's multiple minerals in 1 square. Forgot to screenshot before I chopped it.
Looks like something went wrong with this reboot.
http://img38.imageshack.us/i/skstuck.png/
Edit: Another post just popped up, looks like all the pics are in Deconstruction Zone
How does one contact a GM for help with this? Is it just the F2 bug report?
Yes, and then wait for a GM to arrive to help they say. (they also request only 1 assistance request be filed per party right now - and to avoid the Deconstruction Zones)
I guess either the bug report button or this https://www.spiralknights.com/support/#requests_new
Generally I just go to the list of gms in the wiki and try whispering random names before doing anything.
Oh wow. Make sure to send an ingame bug report (F2) also so they can track the map instance.
You can try to contact a gm to warp you to the next level or something meanwhile.