A windows client unable to connect

Question

One of our windows client is unable to connent to our ipsec vpn server which is on an asus router. It seems it happend without any change on the client or on the router side. The windows laptop throws the following error.

and here is the log ont router side: https://pastebin.com/UYi7CXMR

What sould I do to figure out the issue and solve it.

Answer 1

After a while we found a solution. Changed a the VPN settings on the windows computer: Type of connection from "L2TP/IPsec" to "automatic"

That is weird cause on other instance we set it to "L2TP/IPsec" and worked. Thanks anyway.