Title: wp-admin/admin-ajax.php 500 Internal Server Error
Last modified: April 17, 2024

---

# wp-admin/admin-ajax.php 500 Internal Server Error

 *  Resolved [scont](https://wordpress.org/support/users/scont/)
 * (@scont)
 * [2 years, 1 month ago](https://wordpress.org/support/topic/wp-admin-admin-ajax-php-500-internal-server-error/)
 * After upgrading to version 2.6.2, the add question to test button does not work.
   There is an error in the browser: “wp-admin/admin-ajax.php 500 Internal Server
   Error”
 * In the log:
 * CRITICAL Uncaught TypeError: TUTOR\Question_Answers_List::answer_list_by_question():
   Argument #2 ($question_type) must be of type string, null given, called in /wp-
   content/plugins/tutor/views/modal/question_answer_list.php on line 24 and defined
   in /wp-content/plugins/tutor/classes/Question_Answers_List.php:105 CONTEXT: {“
   error”:{“type”:1,”file”:”/wp-content\/plugins\/tutor\/classes\/Question_Answers_List.
   php”,”line”:105},”backtrace”:[“”,”#0 /wp-content\/plugins\/tutor\/views\/modal\/
   question_answer_list.php(24): TUTOR\Question_Answers_List::answer_list_by_question(
   0, NULL)”,”#1 \wp-content\/plugins\/tutor\/views\/modal\/question_form.php(173):
   require(‘\/home\/c\/cpspec\/…’)”,”#2 \wp-content\/plugins\/tutor\/classes\/Quiz.
   php(1174): require(‘\/home\/c\/cpspec\/…’)”,”#3 [internal function]: TUTOR\Quiz-
   >tutor_quiz_builder_get_question_form(”)”,”#4 /wp-includes\/class-wp-hook.php(
   324): call_user_func_array(Array, Array)”,”#5 /wp-includes\/class-wp-hook.php(
   348): WP_Hook->apply_filters(”, Array)”,”#6 /wp-includes\/plugin.php(517): WP_Hook-
   >do_action(Array)”,”#7 /wp-admin\/admin-ajax.php(192): do_action(‘wp_ajax_tutor_q…’)”,”#
   8 {main}”,”thrown”]}
 * MathJax-LaTeX not used

Viewing 1 replies (of 1 total)

 *  Thread Starter [scont](https://wordpress.org/support/users/scont/)
 * (@scont)
 * [2 years, 1 month ago](https://wordpress.org/support/topic/wp-admin-admin-ajax-php-500-internal-server-error/#post-17694556)
 * The source of the error is that there was no field in the database. When updating,
   it was not added. Restarting the plugin solved the problem.
 * WordPress database error Unknown column ‘answer_explanation’ in ‘field list’ 
   for query INSERT INTO `wpt_tutor_quiz_questions` (`quiz_id`, `question_title`,`
   question_description`, `question_type`, `question_mark`, `question_settings`,`
   question_order`, `answer_explanation`) VALUES (‘24322’, ‘\xd0\x92\xd0\xbe\xd0\
   xbf\xd1\x80\xd0\xbe\xd1\x81 2789’, ”, ‘true_false’, ‘1’, ‘a:0:{}’, ‘1’, ”) made
   by do_action(‘wp_ajax_tutor_quiz_builder_get_question_form’), WP_Hook->do_action,
   WP_Hook->apply_filters, call_user_func_array, TUTOR\Quiz->tutor_quiz_builder_get_question_form,
   referer

Viewing 1 replies (of 1 total)

The topic ‘wp-admin/admin-ajax.php 500 Internal Server Error’ is closed to new replies.

 * ![](https://ps.w.org/tutor/assets/icon-256x256.gif?rev=3193875)
 * [Tutor LMS - eLearning and online course solution](https://wordpress.org/plugins/tutor/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/tutor/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/tutor/)
 * [Active Topics](https://wordpress.org/support/plugin/tutor/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/tutor/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/tutor/reviews/)

 * 1 reply
 * 1 participant
 * Last reply from: [scont](https://wordpress.org/support/users/scont/)
 * Last activity: [2 years, 1 month ago](https://wordpress.org/support/topic/wp-admin-admin-ajax-php-500-internal-server-error/#post-17694556)
 * Status: resolved