Having the same issue. KB5009543 2022-01 Cumulative Update breaks L2TP on Win10 computers. I have about 15 VPNs and they all give the same error now as Darcon's image above. Recreating does NOT fix this. Uninstalling KB5009543 does "fix" it but at some point we will all want this update and probably get it whether we want it or not. Maybe Meraki can start lobbying Microsoft now since this will begin to propagate very soon and show up on more and more customers. If anyone finds a workaround please post. Thanks.
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