Failed to login with an unofficial bw cli tool

I’m using doy’s rbw, a rust cli tool that connects through Bitwarden’s API.

Recently there’s been an issue where the response from the API is just a string ‘error code: 1020’, when it should be a JSON string. I’ve seen a similar issue on the browser plugin from 2019, but no explanation was given as to how the problem was solved. Any ideas of what might be happening?

UPDATE: it’s working again. I’m guessing it had something to do with the api endpoint or cloudflare rejecting requests.