I’m in the process of creating an account.
I entered my email, etc., and Bitwarden gives the following message:
Follow the link in the email to xxxx@xxxx.de and continue with the creation of your account
After I clicked the link, I am redirected. Bitwarden Web vault
Then it counts down for 10 seconds and a spinning circle appears. Nothing else happens after that.
This seems to me to be some kind of temporary problem. If your account was in fact successfully created (even though you only saw a spinning circle), then you could perhaps try to go to https://vault.bitwarden.eu/#/login and enter your login information there.