Can you try following the instructions from the docs here?
I will inform the team about the potential bug you’re referring to, thanks. Lmk if the above solution doesn’t work and you are still facing the issue.
This is not a bug, latest forc version that supports beta-5 is v0.49.3. And latest is pointing to the latest network we have deployed. You can use nightly or custom toolchains for newer versions of forc