"An error has occurred in the script on this page": JavaScript error in widgets or task forms after upgrading Workflow Conductor

ERROR

After upgrading Workflow Conductor, you may receive a JavaScript error similar to the following when accessing certain widget property pages or workflow task forms:

An error has occurred in the script on this page.

CAUSE

Some Conductor Studio forms and workflow task pages containing JavaScript may be cached from the previous version of Workflow Conductor. When Workflow Conductor is upgraded, widget property forms and task forms that include new functionality may not work properly using the cached page.

RESOLUTION

Clear your browser cache and access the page again.