Symptoms
When accessing the log box in the job’s Pipeline Stage View, the log box is transparent and illegible.

Environment
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CloudBees CI (CloudBees Core) on modern cloud platforms - Managed Controller
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CloudBees CI (CloudBees Core) on traditional platforms - Client Controller
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CloudBees Jenkins Enterprise - Managed controller
Resolution
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This issue is seen on controllers that meet the following criteria:
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Contain at least one agent (Connected or offline).
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Are running a Jenkins version less than version 2.249.1
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To fix this issue you must upgrade your Jenkins instance to at least version 2.249.1.1 as there was a fix released in this version to resolve this issue.
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Once you upgrade to at least version 2.249.1.1, the log box will function as intended.
This article is part of our Knowledge Base and is provided for guidance-based purposes only. The solutions or workarounds described here are not officially supported by CloudBees and may not be applicable in all environments. Use at your own discretion, and test changes in a safe environment before applying them to production systems.