cannot leave some areas
There are several threads floating around this section of the forum regarding this bug. So far, they haven’t been merged so it would appear they haven’t been noticed.
https://forum-en.gw2archive.eu/forum/support/bugs/Finished-pers-story-can-t-exit-solo-instance
As you can see, I have the exact same issue. A temporary workaround is to logoff and log back on with your “trapped” character, as this will return you to the shared worldspace.
Thanks for that – sorry I didn’t find your thread in my search to bump it.