David,
Sorry to read that, where are you based (just to see if that is country blocking). Thank you for your reply, after further investigation it was because of WPBAKERY VISUAL COMPOSER.
BUT, both used to worked perfectly fine together. So you might want to have a look into that on your end, as a lot of websites are using this plugin. Anyone who has had, like me, wrapped it into a raw html block, to add more content to the page (for example 2FA FAQs tabs) will not work anymore as it used to.