I have been getting few requests lately of vCenter 6.7 Appliance installation fails after the first reboot. It sounds like a common theme mostly in lab environments. Below is one of the quite few similar errors that I have received.

In both cases that I have helped my friends with, they have inserted an NTP server to sync the vCenter appliance with but forgot to do the same for their ESXi Host. The way to setup NTP on your ESXi host is as follow:

1. Login to your host using the vSphere Web Client
2. Go to Host => Manage => System => Time & Date
3. Hit Edit Settings
4. Configure the NTP Server as in the below screenshot & Save
5. Start the NTP Service Client on the ESXi host, by going to Actions=>NTP Service => Start

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