A flawless operation of the Industrial Edge Management and Edge Devices require time synchronization of the Industrial Edge Management and Edge Devices. To properly synchronize the time on the Industrial Edge Management and Edge Devices, an NTP server is required.
Either use the default configured Debian NTP servers which will be used once you connect the PC, on which the Industrial Edge Management is running, with the Internet. Or, when you operate the Industrial Edge Management and Edge Devices disconnected from the Internet in your local network, provide an own NTP server to which the Industrial Edge Management and Edge Devices must be able to connect to.