I managed to get out of Quarrymill!
This only works on PS4 though!

Set up internet connection like this:

IP Address (set to automatic)
-DHCP host name (set to Do Not Specify)
-DNS Settings (set to Manual)
-Primary: 8.8.8.8
-Secondary: 8.8.4.4
-MTU Settings 1470
-Proxy (set to Do Not Use)

I haven't done any dungeons yet but I could escape Quarryhell!

This was made by user jozu