Just started having an issue when trying to access vCenter from the web client. Initially whilst trying to access I received a “root certificate cannot be null” error. I rebooted the appliance. Now when I try and login I am receiving an error that states: “400 An error occured while sending an authentication request to the vCenter Single Sign On server – An error occurred when processing the metadata during vCenter Single Sign-On setup – null” We are running version 6.5.
I did some reading and a few folk found that a time difference between the ESXi host and the appliance caused the issue. I logged onto the host / server appliance, and the time was incorrect on both. I have since changed this so that they both have the same time, however I still get the same error.