Why is my upgrade controller war cluster operation failing?

Related articles

• Considerations for Kubernetes Clients Connections when using Kubernetes Plugin
• [2.289.2.2] Upgrade/Installation to 2.289.2.2 on CloudBees CI on Traditional through .rpm fails on startup if `JENKINS_HTTPS_KEYSTORE_PASSWORD` is set
• Upgrade Guide: CloudBees Jenkins Enterprise
• Backup plugin is reporting that the user is missing the Overall RunScripts permission