Php dans zip prestashop

Bonjour
j'ai la PHP introuvable dans le zip de l'install prestashop avec ce message : Installing Prestashop 1.7.6.1
An error has occured:
Unzipping error - Unable to find the release zip file. Make sure that the prestashop.zip file has been uploaded and is located in the same directory as this dezipper.
Merci pour votre aide