Web interface not working after reboot

Support
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NethServer Version: 7
Module: DC, File Server, Mail

Hi Team,

I need help on my new Nethserver setup, following are issues.

  1. I has been deploy one Nethserver 7 and update using web interface
  2. I has been configured DC and File server module and it’s working fine.
  3. After reboot server I am not able to open web management interface but I am able to ssh.

Kindly suggest we, I has been installed server two time but same issue