Hi, it seems this problem only occurs for me as the administrator of both the website and the Site Network. I have other options in the menu. I created another administrator account and then I get the same result as you do. Everything seems to be working fine. Rather strange, but apparently solved.
It still leaves this question open of where to find the Claue addons, which I thought were somehow hidden to me with this 404 error. I found a page called “sales” that lists all products that are on sale. The page uses this shortcode : [claue_addons_products display=”sale” limit=”16″ columns=”3″ issc=”1″ flip=”true”]
Yet I have some items showing up in that page which don’t have a reduced price, so I was wondering where the settings for this addon were to be found ?