Can’t crawl the pageurl via visual selector for kolin.com

Hi, I recently purchased this plugin and not sure how to use it well. For example, https://kolin.com.tw/product/fridge I tried to use xpath "//div[@class='thumbnail']/a" or visual selector to get all the fridges URLs but it failed. I am not sure whether I need to enable headless or any extra features to make it work well. Could please help to take a look and give me some advices to use this plugin? Thanks so much. Luke