Individual use: This error appears because a proxy, firewall or antivirus is blocking the access. Please review the configuration of any of these elements that you might have installed in order to allow the Prot-On traffic between the client and the server.
Corporate use: This error appears because a proxy, firewall or antivirus is blocking the access. Please contact your system administrator to review the configuration of any of these in order to allow the Prot-On traffic between the client and the server.