You need at least WordPress version 5.4.2+installed for this theme to work properly. It is strongly recommended that you always use the latest stable version of Wordpress to ensure all known bugs and security issues are fixed. Other requirements:
PHP version 5.6 or greater. But for maximum speed gain we recommend you to use PHP version 7.3+.
MySQL version 5.6 or greater OR MariaDB version 10.0 or greater.