A connection between your computer and the VPN server has been established, but the VPN connection cannot be completed. The ...

A connection between your computer and the VPN server has been established, but the VPN connection cannot be completed. The most common cause for this is that at least one Internet device (for example, a firewall or a router) between your computer and the VPN server is not configured to allow Generic Routing Encapsulation (GRE) protocol packets. Verify that protocol 47 (GRE) is allowed on all personal firewall devices or routers. If the problem persists, contact your network administrator or Internet service provider (ISP) to determine which devices might be blocking these packets.
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