Plugin Conflict

Hey there,

On our new website at https://kennebeckicksrunclub.com/ when I go to the checkout and try to pay with Credit Card or PayPal I’m receiving the error message: Error: Expected an order id to be passed.

When I turn off the WooCommerce Checkout UpSell Funnel Plugin the payment goes through correctly.

Do you know why this is happening and how I can fix it?

Thanks,
Anthony