Error code 5: Entrust certification authority-LIK

Zoom pop out the error message as below when i didn't connect to my company's VPN.  It show" Error code 5: Entrust certification authority-LIK --Certificates are not trusted ". however when i connect to VPN, the error message is gone.

after review the detail, it looks  expired (from 2022-0323 to 2023-03-22).  if anyone know how to re-obtain the certification? thanks in advanced.