Open the SnwlConnect.log and see for below log:
Connect Tunnel has identified an issue on your machine and may not work properly. Please fix the issue before connecting to VPN.
The error is occurred due to corrupted WMI on the Windows machine.
To repair WMI
In the wmimgmt screen, right-click WMI Control (Local) and click Properties.
If Win32_Process shows as invalid class, then follow the below steps to repair WMI: