When you attempted to install SUM on your server, the installation failed and asked you to run the installer again from its program folder.
Known to apply to the following Sophos product(s) and version(s)
Enterprise Console 4.5.0
What To Do
The installer is located in:
C:\Program Files\Sophos\Enterprise Console\SUMInstaller
To run the installer, you will need to use a command stored in the SUM_Install_[####].bat file, which is stored alongside the SUM install package.