WSUS Fails to launch post installation tasks

Hi,

I have a server 2012 essentials box. WSUS was installed from the Roles and Features within server manager. However, after installation, this happens when trying to launch the post installation tasks:

2015-03-26 11:17:46  Postinstall started
2015-03-26 11:17:46  Detected role services: Api, UI, WidDatabase, Services
2015-03-26 11:17:46  Start: LoadSettingsFromXml
2015-03-26 11:17:46  Start: GetConfigValue with filename=UpdateServices-Services.xml item=ContentLocal
2015-03-26 11:17:46  Value is true
2015-03-26 11:17:46  End: GetConfigValue
2015-03-26 11:17:46  Start: GetConfigValue with filename=UpdateServices-Services.xml item=ContentDirectory
2015-03-26 11:17:46  Config file did not contain a value "ContentDirectory"
2015-03-26 11:17:46  Microsoft.UpdateServices.Administration.CommandException: A required configuration value was not found in the system. This is usually caused by installing WSUS through PowerShell and not specifying a configuration file. Review the article Managing WSUS Using PowerShell at TechNet Library (http://go.microsoft.com/fwlink/?LinkId=235499) for more information on the recommended steps to perform WSUS installation using PowerShell.
   at Microsoft.UpdateServices.Administration.PostInstall.GetConfigValue(String filename, String item)
   at Microsoft.UpdateServices.Administration.PostInstall.LoadSettingsFromXml()
   at Microsoft.UpdateServices.Administration.PostInstall.Initalize(Parameters parameters)
   at Microsoft.UpdateServices.Administration.PostInstall.Execute(String[] arguments)
Fatal Error: A required configuration value was not found in the system. This is usually caused by installing WSUS through PowerShell and not specifying a configuration file. Review the article Managing WSUS Using PowerShell at TechNet Library (http://go.microsoft.com/fwlink/?LinkId=235499) for more information on the recommended steps to perform WSUS installation using PowerShell.