Amazon error code 5002 is usually related to account login and access problems.

Here are some solutions you can try:

1. Clear browser cache: First, try clearing your browser cache and reloading the Amazon website. Sometimes, cache problems can cause error code 5002 to appear.

2. Use another browser or device: Try accessing the Amazon website on another browser or device. If the problem only occurs on a specific browser or device, it may be a problem with the browser settings or device configuration.

3. Check account login status: Make sure your Amazon account login status is normal. Try to log in to your Amazon account on another device, or try to reset your password and log in again.

4. Check network connection: Make sure your network connection is working properly and there are no problems. Try to use a stable network connection to access the Amazon website and avoid using public Wi-Fi or unstable network environment.

5. Contact Amazon Customer Service: If none of the above methods can solve the problem, it is recommended that you contact Amazon's customer support team directly to report error code 5002 to them and get further help and support.

Please note that since error code 5002 may have different causes and solutions, the above are just some suggestions. The specific solutions may vary depending on your specific situation.