Certificate validation failure

[sahilkukkar0000]

hi , 

From earlier this morning i facing issue while connecting to my client VPN .  Error : No valid certificate available or  "Certificate validation failure" , If its general issue , please help me get  it resolved .
Thanks ! 

[ccieexpert]

did anything change ? do you have a valid certificate on the machine... Please collect the dart from the client

https://community.cisco.com/t5/security-knowledge-base/how-to-collect-the-dart-bundle-for-anyconnect/ta-p/3156025

that will tell us if there is a cert or not..base on the error, you dont have a valid cert.. its pertty clear.. but dart will confirm that.

[Sheraz.Salim]

A simiar issue is discussed in the past Here is the Link You might need to get intouch with your network team in order to get this issue fixed. as mentioned by @ccieexpert I think @ccieexpert might OP need to download the Dart file from cisco software website.