WordPress’ latest updated came with issues for many websites worldwide, because the popular CMS stopped including the jquery-migrate tool by default. This tool allowed you to keep including jQuery scripts written for older versions of jQuery.
In general, the problems you’ll meet will be concerning features that use jQuery, for example image carousels or visual effects triggered on click. To check if your issues come from there, you can look into your browser’s console (in Chrome, by hitting Ctrl + Maj + I). If you see the “WordPress site Uncaught TypeError: jQuery(…).live is not a function” error message, you