Our themes must be running on WordPress 4.0 or higher. we always check theme compatibility with the latest version of Wordpress. Also it need PHP 5 or higher, and mysql 5 or higher.
Please check such as the following list :
- Check to ensure that your web host has the minimum requirements to run WordPress.
- Always make sure they are running the latest version of WordPress
- You can download the latest release of WordPress from official WordPress website
- Always create secure passwords FTP and Database