[Defender] Defender : The administrator has blocked your IP from accessing this website.

This morning the web site display : The administrator has blocked your IP from accessing this website.

nobody can access to the web site. I must delete the folder by FTP to access to the web site and to the admin. I tried to re install the plugin but there is always the same problem "Defender : The administrator has blocked your IP from accessing this website."

Thanks for your help

Pascal