We wish to access the amazon advertising API and we follow the steps in this link to apply as a partner. However when we tried to submit an application we encountered an error that says,
Please ensure that you are signed into the Amazon account affiliated with your corporate email address. If you do not have an Amazon account affiliated with your corporate email address, you may update your current Amazon account or create an account
We have tried various accounts and email addresses affiliated with Amazon but it still produces the same error. I don't understand what corporate email address are they referring to. How do we resolve this?