T-online email no longer works?

I recently stopped logging into the email from t-online with my iPad (Safari). When I click the icon to log in, the window in which I have to enter my username and password does not open… Instead, a tab opens with the same t-online page that is already open. I have already deleted history and website data, but unfortunately did not help.

It works without problems on my Samsung smartphone and on my laptop, and the login window opens.

Who knows and can help me?

Hello sunbeam69, so you don't use a mail app, but go directly through the browser? I've tried the Telekom Mail app and it works fine. ^ Wiebke