I am using two ESXi 6.5 hosts running independently. Both are DELL servers, utilising local storage. Both are running fine. I have a vCenter licence and I have downloaded the appliance and created a vm for it on one of the ESXi hosts.
When I try to add the hosts to the vCenter's datacenter via "Add host...", it gets the credentials, dispalys the name of VMs on the Host Summary page correctly and after clicking on Finish in the Ready to complete screen, times out after some time saying "A general system error occurred: Timed out waiting for vpxa to start"
I have created DNS entries and PTR entries on my domain server. Time on the vCenter machine and the ESXi host are correct.
ESXi version: 6.5.0 build number: 4564106 vSphere Web Client Version 6.0.0 Build 5112533