I just tried to uncheck friends in one of my gift lists and it threw a 504 error at me (about 4 minutes ago). I refreshed to see if any of the changes had processed and got this:

"An error occurred.

Sorry, the page you are looking for is currently unavailable. Please try again later.

If you are the system administrator of this resource then you should check the error log for details.

Faithfully yours, nginx."

Edit 12/2 at 4:09 Subeta time: This just happened again when training a pet. It was not preceded by a 504 error this time.

I just got the same message when trying to Shop Search an item, so it isn't limited to gift lists.

Locking up as resolved!