from the migration log:
2017-08-18 15:31:41.969Z| migration-assistant-5973321| E: ParsePreUpgradeOutput: Error: Failed to discover a system name that is compatible with both your VMware vCenter Server certificate and your VMware Single Sign-On certificate that can be used to migrate to a VMware vCenter Server Appliance with an embedded Platform Services Controller.
2017-08-18 15:31:41.969Z| migration-assistant-5973321| I: ParsePreUpgradeOutput: Resolution: Regenerate your VMware vCenter Server SSL certificate and your VMware Single Sign-On SSL certificate to have a common system name that can be used to migrate your system to VMware vCenter Server Appliance with Platform Services Controller. DHCP IP Address cannot be used as a system name to migrate to a VMware vCenter Server Appliance.
2017-08-18 15:31:41.969Z| migration-assistant-5973321| I: ParsePreUpgradeOutput: Populated AppNetPnid from PreUpgradeOutput: .
The thing here, you need to reinstall Virtual Center and Update manager.