Logging in app and FF extension on new MacBook not possible

Hi there. Today I got my new MacBook. I installed Bitwarden as an app and as an extension in Firefox. When trying to log in I get the text that my email/password is not recognized. However I can still log in on my other devices and old MacBook. And I can log in the online version on Bitwarden with Firefox on my new MacBook.

Is there a maximum number of apps and extensions? Or do I need to deinstall Bitwarden on old MacBook?

Thanks.

On the login page, there is now a new option to select your Region (US, EU, or self-hosted). Make sure that the selection matches the region for which your account was created (if you don’t know, then most likely it was US).