Once you activate RSS for a site, when you configure RSS on a list for the first time, it creates a file "RssView.aspx" in the list folder
If for some reason, editing or erasing it, you break the file, you'll get this error:
"The selected view is invalid"
After this, creating new lists, copying Rss views or whatever, won't solve this issue.
My solution was to create a new view on the browser's list settings and call it exactly "RssView"