Can't log into FC 27 Companion App

Has anyone else been having issues logging into the FC 27 Companion App?

For some time now, whenever I try to log in, a small browser window opens inside the app instead of letting me log in normally (see screenshot). After entering my password, the page just freezes and nothing happens.

I've also tried logging in through my phone's browser, but when it redirects me back to the Companion App, nothing happens either.

I've also noticed a weird issue with the Web App. Even though I have "Keep me signed in" checked, every time I click the login button, the page just refreshes and asks me to enter my password again. It never remembers my login.

Has anyone experienced something similar or found a fix? It's getting really annoying.