Sorry, I can't send access to production server.

Here is the fill Stack trace:

Error message
E_WARNING: call_user_func() expects parameter 1 to be a valid callback, class 'wpdFormAttrFieldRatingField' not found

Stack trace
in call_user_func called at /wp-content/plugins/wpdiscuz/forms/wpdFormAttr/Form.php (394)
in call_user_func called at /wp-content/plugins/wpdiscuz/forms/wpdFormAttr/Form.php (379)
in wpdFormAttr\Form::render FrontCommentMetaHtml called at /wp-content/plugins/wpdiscuz/forms/wpDiscuzForm.php (263)
in wpDiscuzForm::render FrontCommentMetaHtml called at /wp-includes/class-wp-hook.php (300)
in WP_Hook::apply_filters called at /wp-includes/plugin.php (203)
in apply_filters called at /wp-content/plugins/wpdiscuz/templates/comment/class.WpdiscuzWalker.php (196)
in WpdiscuzWalker::start_el called at /wp-includes/class-wp-walker.php (146)
in Walker::display_element called at /wp-includes/class-walker-comment.php (140)
in Walker_Comment::display_element called at /wp-includes/class-wp-walker.php (371)
in Walker::paged_walk called at /wp-includes/comment-template.php (2094)
in wp_list_comments /wp-content/plugins/wpdiscuz/class.WpdiscuzCore.php (619)
in WpdiscuzCore::getWPComments /wp-content/plugins/wpdiscuz/templates/comment/comment-form.php (269)
in require called at /wp-includes/comment-template.php (1469)
in comments_template called at /wp-content/themes/thevoux-wp-child/inc/loop/single-blog-post-style1.php (65)
in include called at /wp-content/themes/thevoux-wp-child/single-cat-blog-post.php (10)
in include called at /wp-includes/template-loader.php (74)
in require_once called at /wp-blog-header.php (19)
in require called at /index.php (17)

I hope that will help in order to get an advise.

Here is the link: https://asweetlife.org/

I had to disable wpDiscuz  ReCaptcha Plugin because when it is enabled, there is no Captcha at all and the form isn't appear as it should (1 column instead of 2). the HTML code shows nothing inside the element meant to contain the ReCaptcha UI. 

The default form shows it is enabled for guests.

Tested on WP 4.6.1 & 4.7
CentOS 7.2 x64
Nginx 1.11.6
PHP 7.0.13

PHP-FPM 7 Error Logs:

 PHP Warning:  call_user_func() expects parameter 1 to be a valid callback, class 'wpdFormAttrFieldRatingField' not found in /wp-content/plugins/wpdiscuz/forms/wpdFormAttr/Form.php on line 394

 WARNING:  child 9455, script '/wp-content/plugins/wpdiscuz/utils/captcha/captcha.php' (request: "GET /wp-content/plugins/wpdiscuz/utils/captcha/captcha.php?key=c58471e99f13cc") executing too slow (11.501320 sec), logging

331

Please leave website URL to allow us check it. Also please make sure the CAPTCHA field is enabled for Default Form in Comments > Forms admin page. Just edit this form and click on pencil, then see if it's enabled for guests:

307