طراحی قالب وردپرس شرکتی

Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class NaderUtils does not have a method "addCommentFormAfterFields" in /home3/wnfhyokz/public_html/wp-includes/class-wp-hook.php:324 Stack trace: #0 /home3/wnfhyokz/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #1 /home3/wnfhyokz/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /home3/wnfhyokz/public_html/wp-includes/comment-template.php(2815): do_action('comment_form_be...') #3 /home3/wnfhyokz/public_html/wp-content/themes/nader/parts/global/comment-form.php(26): comment_form(Array) #4 /home3/wnfhyokz/public_html/wp-includes/template.php(812): require('/home3/wnfhyokz...') #5 /home3/wnfhyokz/public_html/wp-includes/template.php(745): load_template('/home3/wnfhyokz...', false, Array) #6 /home3/wnfhyokz/public_html/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #7 /home3/wnfhyokz/public_html/wp-content/themes/nader/comments.php(33): get_template_part('parts/global/co...', 'form') #8 /home3/wnfhyokz/public_html/wp-includes/comment-template.php(1629): require('/home3/wnfhyokz...') #9 /home3/wnfhyokz/public_html/wp-content/themes/nader/parts/project/content.php(43): comments_template() #10 /home3/wnfhyokz/public_html/wp-includes/template.php(812): require('/home3/wnfhyokz...') #11 /home3/wnfhyokz/public_html/wp-includes/template.php(745): load_template('/home3/wnfhyokz...', false, Array) #12 /home3/wnfhyokz/public_html/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #13 /home3/wnfhyokz/public_html/wp-content/themes/nader/single-project.php(17): get_template_part('parts/project/c...') #14 /home3/wnfhyokz/public_html/wp-includes/template-loader.php(106): include('/home3/wnfhyokz...') #15 /home3/wnfhyokz/public_html/wp-blog-header.php(19): require_once('/home3/wnfhyokz...') #16 /home3/wnfhyokz/public_html/index.php(17): require('/home3/wnfhyokz...') #17 {main} thrown in /home3/wnfhyokz/public_html/wp-includes/class-wp-hook.php on line 324