That suggests you have a broken add-on in your system, or worse, a damaged JIRA installation, as it can't find a class.
What add-ons have you got installed, and were any of them installed manually? I.e. by using "upload addon" instead of installing through the marketplace?
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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