使用短代码显示图库

I am creating a website with a custom theme in Wordpress, and want to use Everest gallery Lite plugin on a custom template page.

After activating the plugin, creating a gallery and copying a shortcode both through dashboard/page edit and php code in a template php where I'd want to place it using do_shortcode function, nothing seems to work.

I included wp_head and wp_footer. Google chrome reports http error 500 when trying to open that particular page.

Am I missing something? I can’t get it to show.

Any advice on how to debug it is also appreciated!