Solved – You do not have permission to open this Web site in SharePoint Designer 2013

Recently we had installed SharePoint designer 2013, and while trying to open a SharePoint online web site.

However we were getting the below error.

“403 FORBIDDEN403 FORBIDDEN403 FORBIDDEN403 FORBIDDEN403 FORBIDDEN”

Installing the SharePoint designer SP 1 (64 bit in our case) https://www.microsoft.com/en-in/download/details.aspx?id=42009 fixed the issue.

Hope it helps..