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The following installed plugins are deprecated
WMI Windows Agents Plugin
JavaScript GUI Lib: Moment.js bundle plugin
JavaScript GUI Lib: ACE Editor bundle plugin

In general, this means that these plugins are either obsolete, no longer being developed, or may no longer work.
See the linked web pages for further information about the cause for the deprecation, and suggestions on how to proceed.

Your Jenkins data directory /var/jenkins_home (AKA JENKINS_HOME) is almost full. You should act on it before it gets completely full.
You have data stored in an older format and/or unreadable data.
It appears that your reverse proxy set up is broken.
Your configured root URL does not contain the contextPath ("/jenkins").
New version of Jenkins (2.541.3) is available for download (changelog).
Jenkins took some agents offline because their key health metrics went below a threshold. If you don’t want Jenkins to do this, change the setting.
Building on the built-in node can be a security issue. You should set the number of executors on the built-in node to 0. See the documentation.
Jenkins is currently unsecured and allows anyone on the network to launch processes on your behalf. It is recommended to set up security and to limit anonymous access even on private networks.

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