When upgrading from Enterprise Manager to Enterprise Console, if you cancel the upgrade, no console is available.
This is as designed, because the installer removes the old console, i.e. Enterprise Manager, before installing the new one, i.e. Enterprise Console.
Known to apply to the following Sophos product(s) and version(s)
Sophos Enterprise Manager 4.7.0
Supported operating systems
What To Do
No action is required. This is as designed.