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Hi there, Your game circle config may be incompatible after uploading it to the store. If you are signing your .apk with a specific keystore, I'd suggest creating a security profile with the details from this keystore, and then assigning it to your game circle config/app. This will ensure that after your app is resigned by Amazon after being uploaded to the app, all services used should still remain compatible. You may need to create a new game circle config, but it's worth a shot. Hope this helps, Jamie