vCenter error en RP4VM

Hi team:

I have an error in the RP4VM: I get this message

"Failed to retrieve common vLAN's names: Missing vCenter certificate"

when I try to edit the cluster.

Likewise when I want to connect this cluster to another RP4VM I ​​get this message "Operation: Cluster settings modification failed. is in maintenance mode. Contact support for assistance " 

How can this be resolved?

Regards,