User creation in Chef server

Hi, Am new for Chef tool. I have installed the chef workstation, server & client. CLient nodes itself discovered in management tool.

Then again I uninstalled and tried with same package noticed below issue and observation,

  • After installed chefserver , It shows chef server Upgraded.
  • Then adding the user it throw an error like, It tried to connect with Loopback address and retried and failed.

Please suggest and provide solution for this issue.