Amazon App CS11 Error? Try These Fixes

Many users have reported encountering an Amazon ‘CS11 error’ across different Amazon apps (Amazon Prime, Amazon Shoppers, etc.). The error is mainly reported on Apple devices such as the iPhone, iPad, and so forth, but there are also some reported incidents on other platforms like Android.

The issue usually occurs when the user launches the Amazon app or tries to perform a certain action like accessing the cart and accounts section on the Amazon Shopping app.

Along with Amazon server outages, the following reasons have been identified as the main factors which cause the Amazon CS11 error:

Update the Amazon App to the Latest Build

You may encounter error CS11 on an Amazon app (like Amazon Prime, Amazon Shopping, etc.) if the app is outdated, as it may have become incompatible with the Amazon servers. Here, updating the Amazon app to the latest build may resolve the CS11 issue. But before trying that, make sure the Amazon app is supported on your current device (as Amazon restricts usage of some Amazon apps on older phones or devices).

1. Open the Apple App Store and search for the Amazon app (like Amazon Prime).

   

2. Then open the Details page of the app and make sure the app is updated to its latest build. You can also check for app updates in the Updates tab of the App Store.

   

3. Once updated, restart your iPhone, and upon restart, check if the Amazon app is clear of the CS11 error.

Reinstall the Amazon App

The corrupt installation of the Amazon app could be a reason for the Amazon app CS11 error and reinstalling the Amazon app may solve the problem.

1. Launch the Apple App Store and search for the problematic Amazon app (e.g. Amazon Shopping).
2. Now open the app’s Details page and click on Uninstall (or disable, if the app is preinstalled). You can also long-press the app’s icon on the iPhone’s home screen and select Uninstall.
    

   

3. Once the Amazon app is uninstalled, restart the iPhone and upon restart, reinstall the Amazon app from the App Store.
4. Now relaunch the problematic Amazon app and check if it is clear of the CS11 error.

Disable Network Firewall or Add Amazon Exceptions to the Firewall

You may encounter the Amazon app CS11 on the Amazon app if the network’s firewall (like PiHole) is restricting the app’s access to its servers or required domains. In this scenario, disabling the network firewall or adding an exception for the required Amazon domains to the network firewall may solve the problem.

For illustration, we will discuss the process of disabling PiHole (a type of network firewall) on a Windows system, you should follow the exact instructions for your particular network firewall and device OS.

Warning:

Advance at your own risk, as disabling the network firewall or editing its settings may expose the network and its connected devices to threats.

1. Click Windows and search for Command Prompt.

   

2. Now, right-click on the result of the Command Prompt, and in the mini-menu, select Run as Administrator.
3. Now, execute the following:

   pihole

4. Once the PiHole interface is invoked, execute the following in the Command Prompt:

   pihole disable

5. Once PiHole is disabled, launch the problematic Amazon app and hopefully, it is clear of CS11. If so, then add the Amazon domains to the exclusions list of PiHole. Usually, the following domains are required to be added:

   aax-us-east.amazon-adsystem.com 
   
   fls-na.amazon.com 
   amazon-adsystem.com

6. Afterwards, reenable PiHole by executing the following in an elevated command prompt:

   pihole enable

If none of the above works, you could try using the browser version of the Amazon app or another platform app like the Android version of the Amazon app (until the issue is reported to have been resolved).