I want to add a custom made rss feed on my website via the rss widget, but i always get the error "Error: could not find an RSS or ATOM feed at that URL.".
Its this rss feed which i want to add: http://www.laptops-vergelijken.nl/productrss/s0.xml
I have checked the logs to see if wordpress made a http request, but it didn't. So i'am not sure whats going wrong. I have an other rss feeds on my website which does work.
I hope someone can help me with this :)
Also 1 more question: where is the cache folder where the RSS is stored?