Cannot login to server on new clients

I have installed vaultwarden, formerly bitwarden as docker on Synology.
I downloaded the client and installed extensions on all Webbrowsers, including safari, chrome, edge and opera.

So far everything worked always fine.

first, I could not connect anymore on opera,
next I could not connect anymore on my new MacBook.

The error message is: ‘cannot read properties of null (reading iterations)’

Any help much appreciated!!!

@Checole Welcome to the Bitwarden Community Forum!

Vaultwarden is a third-party app that is not guaranteed to be compatible with Bitwarden products. Your best bet is to turn to the Vaultwarden community for support:

Alternatively, you can switch to one of the officially supported self-hosted Bitwarden server options.

Good luck!