
503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x00007f18d0004b00] _serverNamespace = / action = Allow _pipeName =/var/run/vmware/vpxd-webserver-pipe)

https://kb.vmware.com/s/article/79248
https://kb.vmware.com/s/article/76719

check service status

log in to the vc appliainc

The final solution that solved and replaced all the certificates For all Services :