Widgets error on wp 6.0

Several users reported same issue on the WordPress widgets in latest version of the WordPress, 

Please review these topics:
https://colorlibsupport.com/t/site-is-unresponsive-errors-on-the-projects-testimonial-etc-segment/32713/3
https://colorlibsupport.com/t/widgets-errors-on-shaply-theme/32594/2