• Install clean version of DXP
• Update class Article and add an EZCOUNTRY fieldtype and publish on Ibexa Connect and create a new scenario with Ibexa DXP module, select Creat a contnent item function.
• Provide your connection and fill up the fields on Connect in order to create a new Article.
• Run the scenario.

You will notice this error: 

The operation failed with an error. Function 'prepareUserCreateData' finished with error! value.map is not a function

Expected result:

The scenario should create a new article without error