MarketPress Checkout Error

Good afternoon!

In MarketPress settings I have disabled shipping. When I walk click the checkout now button on the cart page I'm getting a 404 error for shipping. can't figure out why.

I have Marketpress set up in a sub-folder to my primary theme so I can use FrameMarket theme just for the store.

Any ideas why this would be happening? I have checked every setting I can think of.

Thanks in advance for your assistance!