Page Builder isn’t working since updating to WordPress 4.7.2

Hello all. I’ve recently updated to the WordPress 4.7.2 and now Page Builder no longer works.

I have tried deactivating all other plugins individually but with no changes.

I can see the Page builder tab when I create a new page, and but it the “”insert” but doesn’t work.

Likewise on all pre WP4.7.3 pages – the Page builder tab isn’t there anymore at all.