Issue
When trying to deploy a workflow making use of "Action Result" from Workflow Context Browser, the following error is thrown:

In this scenario, the workflow was created using 5.2 package and deployed to 5.5 environment.

Error Code
Missing reference at DataField 'Action Result' in Event 'SmartObject Method' in Activity 'Task'. Error: While trying to resolve the following reference root.nodes[{"internalId":2}].configuration.datafields[{"internalId":1}], an error occured: reference not found.. Stack Location : K2Process '52 html' >Activity 'Task' >SmartWizardEvent 'SmartObject Method' >SmartWizardConfiguration >ControlValueCollection >PropertyMapperRowValueCollection >Expression > Stack End.
Resolution
To resolve the issue, the task step in the above workflow will need to be recreated.