vSphere 7.x
vSphere 8.x
vCenter ESXi Certificate mode is configured in Thumbprint mode.
Use legacy thumbprint mode for debugging.
Reconfigure the vCenter to use VMCA ESXi certificate mode or custom mode.
If in vCLS Retreat mode, exit Retreat mode to vCLS System Managed.
For an explanation of certificate modes, see Certificates and Certificate Modes.