Error 5214 only when trying to add a Web Part Page from "More Options"

I can add anything else, new site, new library, etc.

When I try to add a new webpart page I get an error.

Event log is 5214 insufficient SQL permissions.

The EXECUTE permission was denied on the object 'proc_GetProductVersions', database 'SharePoint_Config', schema 'dbo'.

I have tried to no avail:

Open Management Studio. Expand config database (default SharePoint_Config) -> Programmability -> Stored Procedure -> dbo.proc_GetProductVersions. Open Properties, open Permissions tab, click "Search" button. In opened menu click "Browse", and select WSS_Content_Application_Pools and grand this database role "Execute" rights

I'm assuming I just check the "Grant" box and click ok.

Any Help?