As re-installing the game means downloading the patches again (which, on my internet means not playing for at least another day) I've been trying different things by using a friend's PS4 to log my character in and move them out and around different zones.

The Goblet worked fine.
Kugane worked fine.
Yanxia worked fine for a minute, and the errors came up the moment I began a transition into The Fringes.