Site broken after update

[cybe]

Ok, the culprit was this old plugin I didn’t even remember I had installed:-

IFrame Lightboxes

This is a theme component that adds the ability to open iFrames in lightboxes. Samples This component adds an “expand” button on top of the iframes you enable it on. [expand button] Clicking the button will open the iframe in fullscreen in a lightbox. [full screen iframe lightbox] Clicking either the dark area around the iframe or the x at the top right corner closes the lightbox. The same way it works for default image lightboxes. Settings There’s only one setting. You add the domains…

Too bad I didn’t find the safe mode earlier when googling for howto repair a Discourse site and went through so much experimentation. But I learned a lot about Discourse from this.