Here are a few Answerhub posts where users experienced the same issue that you can use for reference. I'd recommend googling the error message you are getting in your logs in the future, which is:
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: System.ArgumentException: Un élément avec la même clé a déjà été ajouté.
Or in English: "An item with the same key has already been added".
Here are the threads:
If these do not work for you, or if after fixing the error you end up getting another one, please provide the new output log.
answered Oct 24 '16 at 08:22 PM
Sean L ♦♦ STAFF
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