It doesn't seem to matter which browser I use, it still re-directs me to the app and that's the problem.
The app can't find it or it's a connection problem (doubt that, I'm on 100/100, the fastest internet connection I can get) so I don't think there's much to be done, unfortunately. Not in my case, but others might be able to get help from this! 
@ratique yeah, same here! I've appreciated all the help I've gotten so far, but man, I'm almost starting to believe I might have to uninstall the app, and THEN press login.
Which... I don't really want to do xD