Unable to purchase a domain

Hello! I was trying to purchase a domain from the cloudflare registrar, and upon selecting “complete purchase”, I get an error saying “we’re sorry, something went wrong with that”. The domain I was attempting to register is liamforboard.com (it’s for a friend’s school board campaign). I’ve filled out my payment information and other details correctly, and have tried with a clear cache and on multiple devices, all with the same result. What is the cause of this issue, and how can I resolve it?