Hi ayoub,
First of all, please check your server PHP version. If it’s less than 7 then upgrade it to minium 7 or newer.
Moreover, if you installed the script to site.com/WhatsIps then it’s not possible to get working the script to relocate files to root. Because it reserves the URL after installation.
For example, you need to extract the WhatsIPs.zip file in the public_html and move the files from the WhatsIPs folder to public_html before starting installation if you want to install the script in the root of your domain. After then follow the installation steps carefully from the provided documentation.
Best Regards,
ThemeLooks Support Team