What are these errors?

I suddenly get 2 errors in the quiz page. I have no idea about this, and what it tells. please help me.

Error 1:
Title: Javascript error detected by QSM Plugin. Try deactivating other plugins and themes. If the error still persists, please report the same on our support forums
Message: Uncaught SyntaxError: Identifier ‘messaging’ has already been declared
Filename: https://www.civilenggnotes.in/wp-admin/admin-ajax.php?action=pwaforwp_sw_files&pwa_for_wp_script=1&sw=pwa-register-sw.js&ver=1.7.10:22:45
Stack: SyntaxError: Identifier ‘messaging’ has already been declared
Page url: https://www.civilenggnotes.in/quiz/building-materials/
Refferer: https://www.civilenggnotes.in/wp-admin/admin.php?page=mlw_quiz_options&quiz_id=1&tab=text
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36
Screen size: 1366×768×24
Screen orientation: landscape-primary
Cookie enabled: true

Error 2:]
Title: Javascript error detected by QSM Plugin. Try deactivating other plugins and themes. If the error still persists, please report the same on our support forums
Message: Uncaught TypeError: i is not a constructor
Filename: https://www.civilenggnotes.in/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4:11:689
Stack: TypeError: i is not a constructor
at Function.h.widget (https://www.civilenggnotes.in/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4:11:689)
at https://www.civilenggnotes.in/wp-content/plugins/quiz-master-next/js/jquery.ui.slider-rtl.js?ver=5.4:21:3
at https://www.civilenggnotes.in/wp-content/plugins/quiz-master-next/js/jquery.ui.slider-rtl.js?ver=5.4:711:2
Page url: https://www.civilenggnotes.in/quiz/building-materials/
Refferer: https://www.civilenggnotes.in/wp-admin/admin.php?page=mlw_quiz_options&quiz_id=1&tab=text
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36
Screen size: 1366×768×24
Screen orientation: landscape-primary
Cookie enabled: true

The page I need help with: [log in to see the link]