Slider Shortcode

Fatal error: Uncaught Error: Call to undefined function gdlr_get_attachment_info() in /var/www/hajduk.dk/public_html/wp-content/plugins/gdlr-shortcode/gdlr-shortcode-elements.php:700 Stack trace: #0 /var/www/hajduk.dk/public_html/wp-includes/shortcodes.php(381): gdlr_gallery_shortcode(Array, '', 'gallery') #1 [internal function]: do_shortcode_tag(Array) #2 /var/www/hajduk.dk/public_html/wp-includes/shortcodes.php(256): preg_replace_callback('/\\[(\\[?)(gdlr_h...', 'do_shortcode_ta...', '<pre class="gdl...') #3 /var/www/hajduk.dk/public_html/wp-includes/class-wp-hook.php(292): do_shortcode('<pre class="gdl...') #4 /var/www/hajduk.dk/public_html/wp-includes/plugin.php(212): WP_Hook->apply_filters('<pre class="gdl...', Array) #5 /var/www/hajduk.dk/public_html/wp-includes/post-template.php(253): apply_filters('the_content', '[gdlr_heading t...') #6 /var/www/hajduk.dk/public_html/wp-content/themes/bento/content-page.php(11): the_content() #7 /var/www/hajduk.dk/public_html/wp-includes/template.php(732): require('/var/www/hajduk in /var/www/hajduk.dk/public_html/wp-content/plugins/gdlr-shortcode/gdlr-shortcode-elements.php on line 700