Issue after going through steps

Hi, I was just setting up the HUB for the site flowersbykay.co.uk and going through the various steps with Security, Hummingbird etc. but have run into an issue with Envira Gallery.

https://flowersbykay.co.uk/reception-flowers/

I can only think this is a minification or php version issue? I've tried deactivating Hummingbird but doesn't seem to have made a difference. Everything was working perfectly before I started to go through the steps but can't tell at what point it went wrong.

Thanks in advance
Henry