Error: [422] Invalid Parameter: assignmentBean value " BaseAssignmentBean

[megkart]

I would like to understand what this error means, [422] Invalid Parameter: assignmentBean value " BaseAssignmentBean.

The context: I have attempted to set assignments by field value. I used the assign multiple action in order to map to assign ID. I have checked that there are no errors in the mapping. {{if(1.`Campaign` = "Popcorn"; "123456")}} {{if(1.`Campaign` = "Candy"; "789101")}}. 

 

 

[Sven-atClient]

Hi @megkart 

It means that there is a blank (value "") that the module didn't like. 
I take it the assignedToID is populated as you expect, with the userID? 

If you can - attach the full screenshot of the module?