When attempting to connect to a VPN using the procedure on how to useMillenVPN Native on Windows 11 or how to use MillenVPN dedicated server on Windows 10/11, "IKE authentication credentials not accepted" may occur during the connection and the connection may fail.
If you are still getting the same error after trying to connect again, we regret to inform you that we recommend using either " MillenVPN" or " MillenVPN Native OpenConnect".
Please check the page linked below and use it.
[ MillenVPN]
How to get started with MillenVPN
[ MillenVPN Native OpenConnect]