@johseffer

I'm also experiencing this problem (yesterday and today). I downloaded m5burner yesterday and created a login (including activating it by clicking on the link sent that email address). I tried both an email with "." and email only lowercase ascii letters ... still same problem: the "login" button shows a spinning animation for about 20 seconds, and then I get a red "Login Failed\nCheck your email
or password." error message in the application.