This SQL Server Reporting Services (SSRS) functionality is not supported. Use Central Administration to verify and fix one or more of the following issues:
A report server URL is not configured. Use the SSRS Integration page to set it.
The SSRS service application proxy is not configured. Use the SSRS service application pages to configure the proxy.
The SSRS service application is not mapped to this web application. Use the SSRS service application pages to associate the SSRS service application proxy to the Application Proxy Group for this web application.
How to Configure all of this?