You need to follow the instructions in the upgrade guides between Jenkins (your version below 2.777.1 and latest. The Jenkins 2.277.1 upgrade guide is especially important to follow at Upgrading to Jenkins 2.277.1 because it will guide you to upgrade to current versions of all plugins, remove plugins with security warnings, remove deprecated plugins, and remove unused plugins.

Refer to Table to Div Migration - Debugging for instructions to diagnose that type of message. The general pattern includes:

• Update plugins to their latest releases
• Remove plugins with security issues (like the TFS plugin)
• Remove plugins that are deprecated (like checkstyle, warnings, etc.)
• Remove unused plugins
• Compare your list of plugins with the plugins known to have issues with tables to divs. Remove or disable plugins with known issues

Selectively disable plugins until you locate the plugin that is causing the issue. Report an issue for that plugin using the "Issue Reporting" instructions.

I have followed that and I dnt see the warnings anymore , uninstalled all the plugins listed on the page but still I see the issue. Not sure which plugin is exactly makimg issue for freestyle or Maven type jobs. While pipeline jobs are working fine.

skilaru, you need to follow steps 5 and 6 of Table to div layout migration - Identifying the broken plugin and Reporting issues

Identified the plugins causing issue , pyenv plugin and ruby-runtime plugin.

Plugin is never expected to be updated. It is a ruby runtime plugin and the ruby runtime plugin is not supported on Java 11.