Customising templates and child themes

A “plus one” for sinrho’s comment at https://www.ads-software.com/support/topic/child-theme-template-directory

When overriding the templates in themes, it doesn’t work if the theme is a child theme. get_template_directory() returns the parent theme directory. To ensure you get the right theme directory even with a child theme directory you need to use get_stylesheet_directory()

--- media-category-library.php.orig     2014-12-14 20:31:24.366038111 +0000
+++ media-category-library.php  2014-12-14 20:31:55.565816808 +0000
@@ -331,7 +331,7 @@
        *@since 0.6
        */
        function get_template_file( $file ) {
-               $template = get_template_directory() . '/' . $this->get_plugin_dir() . '/' . $file;
+               $template =  get_stylesheet_directory() . '/' . $this->get_plugin_dir() . '/' . $file;
                if ( ! file_exists( $template ) ) $template = $this->get_plugin_path() . '/views/' . $file;
                return $template;
        }

https://www.ads-software.com/plugins/media-category-library/