Boot issue on clean Ubuntu Server 20.04 system

Does it really "hung up"? Because

*********-server login:

message means you've successfully booted OS. It's just a later log messages of cloud-init which overrides it a little bit. It looks problematic but it's actually not a reason for an error itself.

Can you try pressing Enter or Ctrl+C on that screen? If it responds, just try to log in with your account.

If you can gain access to the terminal you can disable early boot stage cloud-init services by creating the following file:

sudo touch /etc/cloud/cloud-init.disabled

Additional details on cloud-init in early boot stages of the server can be found in this article.

It hasn't hung. Hit enter. or SSH to it, it works fine