I have the same issue, when editing a fusion builder container/ column and trying to click save/ cancel/ or even the close button “X” its does nothing. However i noticed the colour picker in the “Design” tab open and close after every click and anyone of the buttons mentioned above. Also checked the consol logs, “Uncaught TypeError: Cannot read property ‘addClass’ of undefined” on the colour-picker.min.js file. Will follow the steps mentioned in support trail.
Deactivated all plugins, still have the same issue. please help