Hi,
When this is inserted in a page :
[simple-rss feed="http://feeds2.feedburner.com/thenextweb"]
I get this error :
Warning: Invalid argument supplied for foreach() in WP-PATH/wp-content/plugins/wp-simple-rss-feed-reader/wp-simple-rss-feed-reader.php on line 130
https://wordpress.org/extend/plugins/wp-simple-rss-feed-reader/