Quick fix: The VPN client is unable to establish a connection (Cisco Anyconnect)

This is due to Internet Connection Sharing services running and might have conflicts with Cisco Annyconnect VPN. Follow below steps below to resolve the issue:

1. Go to Task Manager
2. Select Services tab
3. Click on open services
4. Right click on Internet Connection Services(ICS)
5. Click on stop

Now try again it you should be able to connect to VPN.