Fix broken sites after upgrade to WordPress 4.5

I bet you have just updated your WordPress to new version 4.5 and some part of your sites are broken or all of your animation blocks are not appeared anymore. You don’t know what is the reason and don’t know how to handle this issue? So, here is the solution:

First, I need you make sure your plugins and themes have updated to the latest versions. Log out of current administrator session, clear your browser’s cache  and log back into your WordPress admin panel.

Most of the case, if you have installed Developer tool,