I had the toughest time today when my Divi page builder didn’t load up on Chrome, Firefox and Edge when I was trying to update this website. I tried turning off every setting on my WordPress but to no avail. The page just keeps trying and trying and trying to load up the page builder but it doesn’t work. It was only when I deactivated W3 Total Cache that everything worked like normal.
Lessons learned – disable all optimisation plugins during development.