Check the following requirements before installing ECE.
A time synchronization daemon such as NTP or Chrony must be functioning on the system to keep the time in sync. This is especially critical for virtualized and cloud-hosted machine instances.
ECE currently requires setting server hosts to UTC time. If you use non-UTC time on your hosts, some areas of the ECE UI will not function correctly.
Disabled nscd daemonedit
On Linux systems, the name service cache daemon (nscd) can prevent ECE from installing successfully. Before running the ECE install process this service should be disabled on your system.