GRE SharePoint 2013 - User not a site administrator

Hello,

 

After Do the initial stes from GRE, the Content Database was restored and mounted but at the moment in wich i try to "Start Recovery" we receive the message that says: User "domain\user"  is not site administrator for "recovery website"  web page.

Any idea ? Because the user used and logged in is the Adminstrator for this site.