The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer error.
L2TP - Layer 2 Tunneling Protocol (L2TP) could be a tunneling protocol accustomed support virtual non-public networks (VPNs). It doesn't offer any encryption or confidentiality by itself. It depends on associate degree encryption protocol that it passes inside the tunnel to produce privacy.
The reason of L2TP connection fail could be when the Microsoft CHAP v2 protocol is disabled or when the PPP settings are not designed properly. You can resolve this issue by uninstalling the latest Windows security pack, i.e., KB5009543, or disabling the seller ID. Instead, you'll put in the VPN Network Adapter to troubleshoot this downside.
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