There were errors checking the update sites

[MarkEWaite (Mark Waite)]

@marklenders

I find the URL configured correctly in https (https://updates.jenkins.io/update-center.json)
However in other sites I find:
http://jenkins-updates.cloudbees.com/update-center/devoptics/update-center.json

Your Jenkins controller has the CloudBees DevOptics plugin installed. If you’re not using CloudBees DevOptics, you can remove the DevOptics plugin and the DevOptics enabler plugin. That should remove the checks for that update center.