[Bug] Page not found error when logging in to Lodestone

I've had an odd bug for a while (pre Endwalker lodestone update) that happens only in Firefox. Whenever I attempt to log in to the Lodestone my login credentials are accepted, but I get the following error in Japanese (notable since I'm either on the NA or EU lodestone, give or take):

https://i.gyazo.com/ba2233a20eec63e3...1ca2257c58.png

This is a standard page not found error so I figured something went wrong with the caching/redirect. What's strange is that no matter how many times I clear all my browser info in Firefox, this error keeps showing up every time I try to log in.

I'm circumventing it at the moment by using Chrome for Lodestone, but I figured I'd make a post about this.