It looks like the error you’re getting is because you’re running the installer locally, so it’s missing the server name in the registry.
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Sedona Development Company\Client
ServerName and the DataSource in the SedonaMaster key need the server name specified:

This is why we recommend to install clients from the \\YourSedonaServer\SedonaOffice Installation Files location, as a proper server install will create an .ini file at this location that will create the proper registry keys.
If you need more help with this let me know. We can set up a LiveAssist if necessary.