SSP Application is Not Available or Not Showing to be Deployed to a Site

Site needs to be using the same hosting root with the App in the Web Site set up (Setup > Site Builder > Setup Web Site > Setup tab > Default Hosting Root)

In an instance that when app is being deployed and it is not showing up in the list despite of the Reference Implementation had been installed without error and the Library files and Touchpoints are set.

One solution is to make sure that the SSP Application is in the same hosting Root with the Web Site Hosting Root defined in the Web Site Set Up.