While trying to SSH to the CLI of the VLSR appliance VM you encounter failed authentication message and could not login with root.
By design the root user cannot login via SSH/CLI to the vLSR appliance.
Ensure to use admin user to login. then elevate the prompt to root and authenticate with root password.
you can elevate to root using su
If you password gets locked please see KB https://knowledge.broadcom.com/external/article/312789/resetting-admin-root-account-passwords.html
See Kb for further details for locked out or forgotten admin or root passwords.
https://knowledge.broadcom.com/external/article?legacyId=56596