Unable to customize Enigma minimal multi purpose theme

I have purchased Enigma - minimal multipurpose theme from themeforest and wanted to customize it on wordpress but i am unable to do so. Kindly help and guide how i can do that.main problem is that if i am selecting enigma theme it is not loading and preview also not seen.Please help


You can get help from your purchase item author @TDGR right here as a comments

hope they will helped!