Invalid certificate on Anyconnect Secure Client Debian 12

[jan-schroeder]

After installing the secure client I get this error message. It works well on different machines. I can't find any logs that could give me more details about the error.

I'm using Debian 12 and the version 5.1.6-103.

[Mark Elsen]

  - FYI : https://community.cisco.com/t5/vpn/anyconnect-invalid-certificate/m-p/2182322/highlight/true#M80454

 M.

[BlakeBratu]

Without reading a diagnostics bundle, I have run into problems where Linux devices (i.e Android) require not only the identity certificate to be present on the server (in this case, a Firewall, router, or webserver) but also the full certificate chain on said server and is strict.

That, or the signing certificate for the identity certificate is not present on the device. Could you private message me a diagnostics bundle? Let me know if you need help in generating one.