Dashboard Shawing WP HTTP Error

[ Moderator note: moved to Fixing WordPress. ]

Hello Dear,
Actually, I make a clone of my site for another domain and it’s running good, everything is fine but My dashboard is showing error-
“RSS Error: WP HTTP Error: User has blocked requests through HTTP.”

and Add New Plugin is also showing Error-
“An unexpected error occurred. Something may be wrong with www.ads-software.com or this server’s configuration. If you continue to have problems, please try the support forums.”
please Solve this Issue.