Manual Payments not working with Pricing Plans

We added the Pricing Plan app and have set up our bronze, silver and gold plans to work solely with Manual Payments in Editor, but when a user selects a pricing plan there is no way to continue.

After pressing the “Gold plan” button for instance, the list of plans disappears and is replaced with a white checkout form. A pop up states “You can’t order this plan”. After closing the pop up, the plan’s checkout total is visible but the Payment & Buy Now button remain greyed out and there is no obvious way to complete the order or continue.

I realize with Manual payments the order must be manually marked as paid once the cash is received, but the checkout process ends with no record that a person has actually tried to order a plan.

How to get the user’s order to go through and appear in the CMS (marked as unpaid, perhaps)

How to remove or edit the “You can’t order…” popup?

And is there a way to edit the white Wix Plans checkout (it’s a page element, not a page) to link to or show users instructions for how to pay offline?