Fatal error: Uncaught TypeError: get_class(): Argument #1 ($object) must be of type object, null given in /homepages/13/d706869861/htdocs/wp-content/plugins/tw-membership/include/models/celement.php:27 Stack trace: #0 /homepages/13/d706869861/htdocs/wp-content/plugins/tw-membership/include/models/celement.php(27): get_class(NULL) #1 /homepages/13/d706869861/htdocs/wp-content/plugins/tw-membership/include/models/course.php(517): MemberWunder\Models\CElement->is_preview() #2 /homepages/13/d706869861/htdocs/wp-content/plugins/tw-membership/include/controller/pages.php(687): MemberWunder\Models\Course->get_link() #3 /homepages/13/d706869861/htdocs/wp-includes/class-wp-hook.php(308): MemberWunder\Controller\Pages::load_logic(Object(WP)) #4 /homepages/13/d706869861/htdocs/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(Object(MemberWunder\Hooks\Elementor), Array) #5 /homepages/13/d706869861/htdocs/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #6 /homepages/13/d706869861/htdocs/wp-includes/class-wp.php(797): do_action_ref_array('wp', Array) #7 /homepages/13/d706869861/htdocs/wp-includes/functions.php(1332): WP->main('') #8 /homepages/13/d706869861/htdocs/wp-blog-header.php(16): wp() #9 /homepages/13/d706869861/htdocs/index.php(17): require('/homepages/13/d...') #10 {main} thrown in /homepages/13/d706869861/htdocs/wp-content/plugins/tw-membership/include/models/celement.php on line 27