To use Dev WordPress Theme, we recommend your hosting supports WordPress 4 or greater, PHP 5.6 or greater version (WordPress is now recommending PHP 7, read more) and MySQL 5 or greater version.
If you want to ask your hosting vendor about this requirement, Here is a sample letter which you can send to your hosting company; just copy and paste and send them!
I'm interested in running WordPress web software on my Website Domain and I was wondering if my web hosting account supported the following: - PHP 7 or greater - MySQL 5.6 or greater OR MariaDB 10.0 or greater - Nginx or Apache with mod_rewrite module - HTTPS support Thanks!
PHP Configuration limits
Issues you may encounter, such as demo content fails when importing and similar issues, are generally related to excessively low PHP configuration limit settings. You can either increase these limits on your own or contact your web hosting and ask to have the limits increased to the following minimums:
Verify your PHP limits
You can check them by installing the WordPress phpinfo() plugin and checking Settings. The first column refers to your installation value, and the second column refers to the limits of your host. The latter values are often lower if you have selected a cheaper hosting package.