Sign In on linux based distributions always produces the "Connection Lost" dialog box (see attachment).
I have periodically tried signing in over the past 2 years, at some point it still worked, but in more recent times it just always produces the dialog box in the screenshot, no matter how many times you reconnect/sign in, check the ports on network, it doesn't seem to care. Ironically the android one works fine, but editing a deck on that platform inspires thoughts of arson related to the WoTC headquarters. So, I ask with tears in my eyes, what is it that makes it so ******* dangerous to allow someone on linux to simulate cardboard battles against other people?