Ich kann mich nicht mehr anmelden

[Friederike Hegemann]

und auch den Sicherheitsschlüssel bekomme ich nicht per Mail, was kann ich tun?

[Theodoro Reato]

Hi Friederike,

I don't see 2FA on your account, you should be able to reset your password and log in to your account. - I checked the email attached to the account you're using on this post. 

If you're seeing an error while logging in, let's analyze your browser.

Clearing your cache/cookies and allowing cookies would change this type of error.

Please see the article Troubleshooting browser issues with Trello for detailed instructions on troubleshooting any problems with Trello in the browser.

If that doesn't work, let's:
1- Test using an incognito window of a supported browser like Safari, Chrome, Firefox, or Edge
2- Test in a different browser

I hope this helps, have a great day.