It’s only similar on the surface. There are many reasons errors can occur during login. In the thread that you linked, the issue was that OP was running third-party server software that is not a Bitwarden product, and attempting to use a Bitwarden client app to log in to their self-hosted server that was running incompatible software.
In the meantime, did you try to find your keyHash value using the method I had suggested here?