I can not search for products

First, please make sure that you are using the ROOT Credentials, not the IAM ones.

 

If you have entered your Amazon credentials but when you try to search for products you receive this message:

AWS.InvalidAccount: Your AccessKey Id is not registered for Product Advertising API. Please use the AccessKey Id obtained after registering at https://affiliate-program.amazon.com/gp/flex/advertising/api/sign-in.html

Then, make sure that you have activated the Product Advertising API, by following that link.

 

If this error would still show up after doing that, what you have to do is to RE-generate and use the ROOT keys. You can find this if you click on your name (in the upper right corner) in the amazon page and then go to Security Credentials.

In this page if you click on Access Keys (Access Key ID and Secret Access Key), you will see the Create New Access Key button.

When you click on this button, new keys will be created and you can now enter these keys in the Amazon Config tab.