I see that you have enabled the setting of "Automatically punch out offline users"
To Change this setting, just follow below steps:
1. Login with admin account
2. Go to uKnowva Configuration
3. Click on Plugin manager
4. Search for virtual biometric plugin
5. Find the setting mentioned above and save it.
Also, can you put a screenshot of the error you are getting while punching out from desktop? It will help us assist you better