MarketPress - Fatal error: Call to undefined function product_meta()

I have been setting this site up for the last couple of weeks and the products where working but now I get this fatal error. Fatal error: Call to undefined function product_meta()

Does anyone know what could have caused this error? I am wanting to move this site to the clients and make it live this week. And wouldn't you know the moment I am almost ready I get a fatal error

The only thing I have been working on was adding forms from gravity form. It had still been working after creating the forms because last Friday we did a order test and got an error with our payments settings. Which I was about to work on when I ran across this error.

So if you go to view the individual products you will get this error.

Thanks for any help!