Main causes
Rate limiting
A limit for the amount of requests a user can send to Amazon within a specific time period. Sending too many requests in a short amount of time could trigger this error.
Geo-restrictions
Amazon services are unavailable in certain countries. Some features or pages may be restricted in specific regions to segment audiences and provide differentiated offers.
Browser fingerprinting
Amazon collects cookies, headers, and other browser parameters to create and assign a unique digital fingerprint as a tracking measure to identify and restrict bot activity.
Broken URL
The simplest reason for encountering such a response from Amazon is the URL you are attempting to access is either incorrect, leading to an invalid destination, or it no longer exists.