Why is my 'Add to Cart' button not working on all products?

[YAKKA-STRENGTH]

Hello,

My add to cart button is not working on every product. How is this fixed? E.g via link. 

https://yakkastrength.co.uk/collections/collars/products/vug-aluminum-collars

[bogui]

Hello, Yakka,

There is no button to be clicked in this form:

Maybe you missed something!

[YAKKA-STRENGTH]

Do you know why there is no button? Some of my other products have a button like the link. 

https://yakkastrength.co.uk/collections/plates/products/competition-olympic-bumper-plates

[bogui]

From customer point of view, I can't tell much, but here you do have a button (or in this case a input of type Submit) - 

You probably are doing something different. Do you have some plugin or extension interacting on the page with problem (something like countdown of sort for example??)

[bogui]

You have so many errors on the page! 

And the page loads with working button but it's brakes for some reason:

[YAKKA-STRENGTH]

Wow that’s not good. Is that on Google Search Console? 

[bogui]

Contact the app developer. If the problem started after you installed the app. 

[YAKKA-STRENGTH]

Not that I know of. We have started to use RedBrain which is an app that does Google Ads for our products but I don’t understand how the add to cart and buy now button is working for the majority of my products but not for a select few.