Failed to resolve component: PDF

[abdo-host]

[Vue warn]: Failed to resolve component: PDF
If this is a native custom element, make sure to exclude it from component resolution via compilerOptions.isCustomElement. 
  at <CourseContent key=0 chapters= {is_loading: true, list: Array(0)} course-enrolled=true > 
  at <CourseViewPage id="master-laravel-for-beginners" onVnodeUnmounted=fn<onVnodeUnmounted> ref=Ref< Proxy(Object) {check_course_enrolled: ƒ, get_course_details: ƒ, get_course_lessons: ƒ, get_related_courses: ƒ, …} > > 
  at <RouterView> 
  at <CoursesPage onVnodeUnmounted=fn<onVnodeUnmounted> ref=Ref< Proxy(Object) {…} > > 
  at <RouterView> 
  at <App>