Star Wars Squadrons via Steam Error 4975

UPDATE:

I don't know how, or why, but after playing around with the invisible login interface for a while, it finally worked.

After reading @KramerThCourier 's solution in this thread, I played around with blindly entering my EA account's e-mail and password in the blank overlay.

First entering the e-mail, hitting <TAB>, then entering my password, and hitting <enter>.

This prompted the blank overlay to refresh. However it was still blank. The assumption is that now I was on the security code prompt dialogue.

I tried to fumble through the "new" invisible prompt, trying to guess the correct key combination to allow me to enter the security code from my app, and randomly trying to enter it.

With no luck! My random attempts just resulted in the dialogue closing and the same error appearing on screen.

At some point I gave up on trying, then came back to it a few minutes later, pressed reconnect again, and the game simply crashed.

However, after launching the game again, I instantly got the gray overlay, and the security code dialogue magically appeared! As in it was actually visible. This is the 1st time it happened after dozens of attempts. I'm not sure what I did differently.

There was no prompt for e-mail/password, it went straight to the security code dialogue. I'm assuming those were "saved" from the previous blind input attempts.

So I just chose to verify via my security app, hit next, entered the code, made sure that "Remember this device" was checked, and that's it! It works now. And I didn't have to disable 2FA.

Honestly, it shouldn't be this complicated. It really feels like dumb luck that this worked, as I can't say exactly what changed after multiple attempts that suddenly made it work. My only guess is the wait time between entering your e-mail/password blindly, and hitting reconnect again to get the security code dialogue? Idk.

By the way, I didn't need to disable Steam/EA overlays like mentioned in @KramerThCourier 's thread. My guess is that's not strictly necessary.