cannot restore backup


i’ve been working with several of you there for the past few days. i would like to make a backup of my website, . unfortunately, before i discovered your plugin, i had installed autoptimize, wp super cache and several others. i used your software scan ap and found references to these plugins and more. i deactivated these plugins a while ago, but it seems their ghosts remain! and perhaps that is why i cannot backup my site? however, isn’t it strange that when i run a backup (not a snapshot) i do not get an error message? in fact, i get a message that says ‘backup successful’.