Add To Cart Button Disappeared

On my test site the add to cart button disappeared, but i can't figure out why. I uploaded the default (responsive) default_template.tpl and /common/productdata.tpl and it still doesn't appear. When I use the bigpicture view it does appear.

I don't use catalog mode, so now I am lost on why this is happening. Any suggestions where I should look for?

no addtocar.png

PM me temporary FTP access so that we can check the issue on your server