Hi @Grg, version 1.6.4 of the Amplify framework depends on 2.19.3_ (https://github.com/aws-amplify/amplify-android/blob/5467886bf890b5c68ac135a4cf6024a51235fd11/build.gradle#L54) of the AWS SDK. Your build.gradle depends on 2.13._ of the AWS SDK, which is not compatible with your version of Amplify (1.6.4), and is likely the reason why you are seeing this crash.
You should not need to depend on the AWS SDK at all, unless you actually need to use AWSMobileClient directly. The recommended approach for new apps though is to just use Amplify, which sits on top of AWSMobileClient. Here is the documentation for signIn with Amplify: https://docs.amplify.aws/lib/auth/signin/q/platform/android
If you do still need to use AWSMobileClient directly, make sure to use the latest version so it is compatible with Amplify, which is 2.19.3.
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