Sign in - please wait

Hello development team.
For some reason I cannot sign in to the app, which is rather frustrating. I have followed the guide regarding 3rd parti cookies (also the solution about making an exception for language reactor). Sadly, it still won’t move on from the please wait screen.
Any way to fix this? I like the software and would very much like to use it in my language learning.

Kind regards,

Is there a reason several of us with this problem are being ignored?