Fatal error: Uncaught Error: Call to a member function is_complete() on string in /home3/productr/forum.productrealize.ir/wp-content/themes/buddyboss-theme/inc/plugins/lifterlms-helper.php:1552 Stack trace: #0 /home3/productr/forum.productrealize.ir/wp-content/themes/buddyboss-theme/inc/plugins/lifterlms-helper.php(1492): BuddyBossTheme\LifterLMSHelper->llms_get_progress_bar_html_course_single(0, 'lesson', Array) #1 /home3/productr/forum.productrealize.ir/wp-content/themes/buddyboss-theme/lifterlms/lesson/template-single-lesson-sidebar.php(60): BuddyBossTheme\LifterLMSHelper->lifterlms_course_progress_bar(0, false, false, true) #2 /home3/productr/forum.productrealize.ir/wp-content/plugins/lifterlms/includes/functions/llms.functions.template.php(120): include('/home3/productr...') #3 /home3/productr/forum.productrealize.ir/wp-content/themes/buddyboss-theme/single-lesson.php(25): llms_get_template('lesson/template...') #4 /home3/productr/forum.productrealize.ir/wp-includes/template-loader.php(106): include('/home3/productr. in /home3/productr/forum.productrealize.ir/wp-content/themes/buddyboss-theme/inc/plugins/lifterlms-helper.php on line 1552