Why does Jenkins say “This Jenkins instance appears to be offline”

Question

I have a fresh install of Jenkins 2.32.2 on Ubuntu. Opened a browser on the instance and get to a page titled Offline, with the message \"This Jenki

Answer 1

In my case i have changed https to http in URL line of /var/lib/jenkins/hudson.model.UpdateCenter.xml file and restart the jenkins, its start functioning.