I don’t understand why CoinBase is so irresponsible regarding developer support. Its really painful to work with coinBase API. Can you have a look here , Its been around a week and no response :(
Where is your Sandbox? and your customer support? Your #bot_support is totally useless. I had asked may of many friend to try and all of them got nothing else than frustration from you #support_Bot.
Why are not learning from stripe or paypal? they have such a rich documentation that user don’t have contact anyone.
Please have a look the issue and fix it asap.