I'm getting the following error from a workflow that hasn't had any changes made to it. Does anyone know what might be causing this error?
Object of type 'System.Workflow.Activities.CorrelationTokenInvalidatedHandler' cannot be converted to type 'System.Workflow.ComponentModel.IActivityEventListener`1[System.Workflow.Runtime.CorrelationTokenEventArgs]'.
Solved! Go to Solution.
Was there any update to Nintex Workflow in your environment? Strange errors like these regularly happen after an update when admin forgot to also update the database.