Welcome to the forum!
If your server software is not an official Bitwarden product, then there may be compatibility issues. As you are evidently using Vaultwarden, your best bet is to turn to the Vaultwarden community for support:
Welcome to the forum!
If your server software is not an official Bitwarden product, then there may be compatibility issues. As you are evidently using Vaultwarden, your best bet is to turn to the Vaultwarden community for support: