Cannot Fetch feeds on a site

I am creating a page to display all the feeds coming from my different blogs. I am using the existing wp_rss function to display the feeds but one feed doesn’t display on the page. Or maybe the page cannot fetch the feeds.

Scenario:

I have a ‘test site’ where I call wp_rss(‘https://feed_one/’, 5), feed_two, feed_three; all works fine. But when I transferred the script to the ‘working site’, feed_one gives an error. It doesn’t fetch any feed, thus, error is returned. All other feeds are working. I am currently using wordpress 2.7 on both sites. Both sites are hosted on the same server.

This is the error:

“Warning: array_slice() [function.array-slice]: The first argument should be an array…”