guys i have a similar problem as well with 1 VM. I have had to migrate our vCenter VM from Hyper-V to ESXi so I used the vmware convertor but I had to migrate it a an ESXi host that wasn't added to vcenter because it said that I needed to have my vcenter server running which obviously couldn't be running as I was converting it.
Anyway the conversion went through fine and then I transferred the entire converted vcenter VM folder to a new datastore and then added it into the inventory whilst i was logged into vsphere and not vcenter, Now the vcenter server isn't showing up when i log into vcenter yet it shows up fine when i log directly into the host. I've restarted the vcenter server but still no luck.
What do I need to do?