When I try to log in with the browser, I have no issue. But I think Thunderbird may have some sort of adblock feature that hides the continue button. The email account is managed by Google but logging in through Google's gmail has no issue. Anyone had a similar experience? No change when using Linux/Windows. Email account is also a school account so it has to pass through their authentication site before going back to the google site. When I tap the email address as it is correct, nothing happens. No redirect to thunderbird, etc. No "next" button appears to proceed.