Steps to replicate the issue (include links if applicable):

• Open a window to Toolhunt and another to Flower (localhost:5555)
• Login and select a task of type audiences, content_types, tasks, or subject_domains.
• Submit data
• Check Flower logs and you'll find the following result for make_put_request:

{  'code': '1000',   
   'message': 'Validation Failed',   
   'errors': [
   {
      'code': '3101', 
      'field': 'subject_domains', 
      'message': 'Enter a valid value conforming to the JSON Schema.'
   }
]}

What happens?:

This is happening because the data is being sent as a string. Toolhub expects an array of strings.

Unfortunately, Toolhunt expects a string, so this is going to require both front and back-end fixes.

The frontend fix should be as changing line 29 of UserContributionForm.vue to be simply value: fieldValue

I'm working on the backend fix.