Seeing this error as well.
“An error occurred, please try again or try an alternate form of payment.”
Themes and plugins are up to date.
The 2nd address field is unhidden.
Downgrading the plugin to 2.0.5 didn’t help.
Thanks for the explanation.
As the original post states, “I see I can click on them and put a checkmark there, but when I save they go back to being a red X.”
How can I as an admin reverse the negated status?