Hi Devs , OpenConnect client version v5.99 is not compatible with latest version of Windows TAP driver which is 9.0.0.21. although it works fine with older versions. If you have latest version of TAP driver installed , you will get this error from openconnect while trying to setup TAP network interface : Failed to obtain TAP driver version: 57 I checked openvpn client and it works fine with latest version of TAP driver. I hope you can rectify this bug in next version. Regards