angelstar

Hello. I am new to prestashop and have a lot of questions. At first of all, I want to know how to change my pt theme. i download prestashop1.7 and free open-source pt1.7 theme. and now trying to change theme. so go to admin panel and improve / desigins / themes & logo. and add new theme and select downloaded zip file of theme and press save button. and now get this error. This theme is not valid for PrestaShop 1.7 downloaded theme from: https://github.com/devilthemes/blackhawk4x.git