try to make a new account in OpenAI API key to get a new API key because I have the same problem yesterday, the reason why it because it not free to play in this game I saw many comments that it not free there is a limit to buy it, its a free trial on the OpenAI so my option is to make another account multiples time the most annoying is to add a number, once u get a new account. I mean you can buy it if want. I don't have any option try it see it work.