Why is there a liquid error and no 'add to cart' button on my product pages?

Hi Everyone,

I am new to shopify and I only set up my account this week. I have the below error message on every product page

Liquid error: Could not find asset snippets/pre_order_custom.liquid Liquid error: Could not find asset snippets/master-controller-helper.liquid

I’m a complete novice at code and have no idea how to get rid of this? Also if my products are in stock it has a sold out and a buy it now button? but no add to cart button? and the products in stock only have ‘buy it now’ any ideas how to fix this?

Many Thanks

Kate x

I’m having the same issue. Did you ever find a solution?

Thank you!