On both mobile and PC and Mac. Get the error "Cookies are required to log in to this site. You will not be able to log in until they are accepted." Then stuck in an infinitely recursive loop every time I click the log in button. Cookies are allowed on all three machines. In fact a) I can see the cookies there and b) I have better luck logging in if I switch to incognito. It may be anecdata but it seems to log in better if I don't check the "remember me" cookie.