Upload pimcore site

Hi, i’m a beginner on pimcore so this could so easy but I can’t find a solution about this problem.
I have a full backup of site and db so my unique ideas was to copied that in the server and import the db in phpmyadmin. I modified system.php with my new username,password and dbname but now I have a blank page:
You don’t have permission to access this resource.
Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.
I’m sure to do something of stupid but I don’t know what. Cattura

You have .htaccess in /web folder?

Thanks @mittererr for your respond. Yes, I have it. It contains hundreds lines of code and most of that has the name of the previous site where I have no access. Shoud I remove every single line?

Are the access right on the folder correct?