Emptying cart causing an error on donate page

There are numerous problems that stem from combining this module's flow and the traditional checkout flow in the same site. I've finally had time to return to work on this module and I've built a second checkout flow that extends the standard multistep flow. See the latest dev branch.

Added guided configuration via a settings form at admin/commerce/config/donation-settings. Automated tests still needed.

Automatically closed - issue fixed for 2 weeks with no activity.