Hello there,
Do you have any GPO applied?
Is there anything in event viewer?
I would suggest you to use proc mon to identify if there is nothing on the event viewer.
You may need to recall if you did a Windows update and see if that helps.
Check whether you're using a validated VPN device and operating system version. If the device isn't a validated VPN device, you might have to contact the device manufacturer to see if there's a compatibility issue. Make sure that the VPN device is correctly configured.
Hope this resolves your Query !!
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