Amazon Reports showing no “link-clicks that did not generate any orders”

Hi, I was hoping someone might be able to explain if I've done something wrong. I changed my Amazon API a couple of months ago and, since then, despite recording hundreds of clicks being shown on the main daily report graph, the report "Items with No Orders" hasn't shown any data. It just says 'no data found'.

Previously it used to give me a good indicator of which items were popular but not quite there yet. Does anyone else have this problem? I've tested my Amazon links and they're all…

Amazon Reports showing no "link-clicks that did not generate any orders"