Since the 3rd of January 2019 the API Url for the deal duplication gives the error {“success”:false,“errorCode”:500} and does not create a duplicate of the deal as well. If I try via the API Reference page it does work. Could somebody please help me out with this. This issue suddenly came up after an year of smooth running.
I managed to fix it. It’s very weird though because, even though this request does not need any post data such as which is required in update deal functions. We need to send an empty data set along with calling the duplicate function. Now all good.