Need feedback for not working RSS feed

by electro-space , Tuesday, September 11, 2018, 04:33 (2217 days ago)

Hello everyone,

last weekend I installed selfoss, imported all the feeds but received the following error from this feed: https://www.residentadvisor.net/xml/rss_news.xml

I get this error: error loading feed content: cURL error 22: The requested URL returned error: 520 Origin Error

Can someone explain to me what this means? Is it an erroneous feed or do I have a problem?

Kind regards!