There are two common issues you may encouter,
Your API key may be incorrect. If you get a 403 status code, this indicates your API Key is incorrect.
Your balance may be less than the job minimum. We verify that you have sufficient balance on your account that is equal to the minimum job charge ($5). If you do not have sufficient balance, you can increase your account limit by adding a credit card to your account, adjusting your spending limit if you ready have a credit card, or paying your outstanding account balance. If you have sufficient balance on your account, contact support for assistance.