I’m so sorry about the speed bump here. I’m sure this is a frustrating experience for you. I would suggest removing any special characters such as &, +, or -. Our system also recognizes letters with accent marks (é) or tildes (ñ) as special characters and these will have to be omitted.
If you don't have any special characters in your shipping address, make sure the entire address is filled out, including state and zip. If the "State" field is not populating, try switching the country to Canada then back to the US. That should force it to pop open!
If none of these solutions solves the problem, please take a screenshot of your shipping address filled out and send it over to email@example.com - we'll get you taken care of!