Error when trying a node in maintenance mode

[Atrixon]

This is the error I get when I try to put any host into maintenance. I understand that this started happening when they updated the certificate.

The strange thing is that in the certificates section, I don't see the new one. And when I try to import it it tells me that it already exists.

This is in a productive environment. Any Suggestions?

[battybishop]

Check the status of the WCP service by SSH onto your vCenter and running service-control --status wcp if it's not started use service-control --start wcp

There's also this Dell support KB Dell EMC VxRail: ESXi host fails to enter or exit maintenance mode with the Error message: Failed to...

Which version of vCenter are you running as people have also resolved this issue by upgrading to a later version?