Account creation not possible despite confirmed login credentials
Hello,
When creating a new account with the email provider @gmx.de, after entering my name, email address, and password, it is confirmed that this combination is found in the Mozilla ISP database. (1)
After clicking the 'Done' button (2), an error message is displayed (3).
I can log in to the email account using the same credentials via a browser.
What could be the cause of this behavior?
Thank you in advance for your assistance.
Martin Kuhr