Unable to purchase chatgpt open api

Dear Support,

I encountered an error while attempting to purchase the Open API. Could you please check the error shown below and provide assistance?

Your prompt response would be greatly appreciated.

Best Regards,

There currently seems to be a small bug jn the system that prevents the addition of a new payment and credits in a single step. Try to separate the steps, ie first enter and save your card details under payment method and verify that it they were successfully saved. You may have to do a browser refresh as well. Then in a second step, add the credits.