Issue
Pipeline jobs spam the log with the following exception:
java.lang.NoClassDefFoundError: org/jenkinsci/plugins/workflow/support/steps/input/InputAction
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
The bug is related to the Pipeline: Stage View Plugin. You have to upgrade this plugin to 1.3 or higher.