Slider Shortcode

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Fatal error: Uncaught TypeError: Unsupported operand types: int % string in /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-content/themes/thekeynote/include/function/gdlr-media.php:623 Stack trace: #0 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-content/plugins/gdlr-shortcode/gdlr-shortcode-elements.php(736): gdlr_get_gallery(Array) #1 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/shortcodes.php(433): gdlr_gallery_shortcode(Array, '', 'gallery') #2 [internal function]: do_shortcode_tag(Array) #3 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(galler...', 'do_shortcode_ta...', '<h3 class="gdlr...') #4 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/class-wp-hook.php(324): do_shortcode('<h3 class="gdlr...') #5 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/plugin.php(205): WP_Hook->apply_filters('<h3 class="gdlr...', Array) #6 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-content/themes/thekeynote/include/function/gdlr-utility.php(16): apply_filters('the_content', '[gdlr_heading t...') #7 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-content/themes/thekeynote/single/content-page.php(3): gdlr_content_filter('[gdlr_heading t...', true) #8 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/template.php(792): require('/home/clients/7...') #9 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/template.php(725): load_template('/home/clients/7...', false, Array) #10 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #11 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-content/themes/thekeynote/page.php(33): get_template_part('single/content', 'page') #12 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-includes/template-loader.php(106): include('/home/clients/7...') #13 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-blog-header.php(19): require_once('/home/clients/7...') #14 /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/index.php(17): require('/home/clients/7...') #15 {main} thrown in /home/clients/7be56d5ef2a01db11e67d4e78134db56/web/wp-content/themes/thekeynote/include/function/gdlr-media.php on line 623