Windows 8,10,11 Error 809: The network connection between your computer and the VPN

Windows 8,10,11 Error 809: The network connection between your computer and the VPN

• For Windows Vista, 7, 8, 10 and 11 

  REG ADD HKLM\SYSTEM\CurrentControlSet\Services\PolicyAgent /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f

   

• For Windows XP ONLY

  REG ADD HKLM\SYSTEM\CurrentControlSet\Services\IPSec /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f