fix js error with save and resume addon

js/qsm-quiz.js

@@ -962,8 +962,10 @@ function qmnInit() {
 				jQuery('.qmn-multiple-choice-input, .qsm_dropdown, .qsm-multiple-response-input').change(function () {
 					let $this = jQuery(this);
 					let value = $this.val();
+					let quiz_form_id = $this.parents('.qsm-quiz-form').attr('id');
+					let quiz_id = quiz_form_id.replace('quizForm', '');
 					let question_id = $this.attr('name').replace(/question/i, '');
-					let data = qsm_question_quick_result_js(question_id, value, '', qmn_quiz_data[key].enable_quick_correct_answer_info,key);
+					let data = qsm_question_quick_result_js(question_id, value, '', qmn_quiz_data[quiz_id].enable_quick_correct_answer_info,quiz_id);
 					if (data.success == 'correct') {
 						$this.parent().addClass("qmn_correct_answer");
 					} else if (data.success == 'incorrect') {
@@ -1333,7 +1335,7 @@ function qmnInitPagination(quiz_id) {
 jQuery(document).on('qsm_next_button_click_after qsm_previous_button_click_after', function(event, quiz_id) {
 	let video_sections = jQuery(`.qsm-quiz-container-${quiz_id}.qmn_quiz_container`).find('video');
 	let iframeVideos = jQuery(`.qsm-quiz-container-${quiz_id}.qmn_quiz_container`).find('iframe');
-	
+
 	iframeVideos.each(function() {
 		let src = this.src;
 		jQuery(this).attr('src', src);