when logging in to vaultwarden (1.34.3-9017ca26), this diagnostic is generated:
POST /identity/connect/token
Unauthorized Error: No Bitwarden-Client-Version header provided
User [email protected] logged in successfully via API key. IP: 10.10.10.10
(login) POST /identity/connect/token => 200 OK
the user apparently still gets logged on successfully, so despite it saying "Unauthorized Error", it can probably be treated as a warning.
i guess the solution would be to just send the Bitwarden-Client-Version header with every request.