Help adding instructions to payments

[John86y3]

I have set up an "Add to Cart" button. 

I chose Yes under "Can your customer add special instructions in a message to you?"

However, when I test the button, it does not allow the customer to add instructions.

Can anyone please help me to figure out a way to get this to work?

It seems that the feature is no longer supported by PayPal, and I need to figure out what code to add to allow the buyer to add instructions.