Site Heavy load - site is currently offline

Why I get when refreshing XML feeds 2 pieces this message?:
xyz is currently offline. Cloudflare’s Always Online™ shows a snapshot of this web page from the Internet Archive’s Wayback Machine. To check for the live version, click Refresh.

When run 1 is okay. Other webpanels not have this problem, can anywhere lift this limit for scripts or what is this?