Error Message on new theme

I’m trying to view a new theme when I go to the themes page and hit “add new”, nothing appears except for this message: “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.”

Also, on the top of the page, it says: “Please Install and Active Redux Framework Plugin for Theme Option. Click Here” But then it downloads a .zip file to my computer.

Please help.