react-native-keychain library update from v8.0.0 to 8.1.1

Question

I'm on RN 0.66.0 and I'm trying to update from v8.0.0 to v8.1.1. iOS is working perfectly, but when I try to launch in Android I get the error Attempt to invoke virtual method 'boolean com.facebook.react.uimanager.FabricViewStateManager.hasStateWrapper()' on a null object reference.

Adding this to app/build.gradle worked for me:

dependencies {
    ...
    implementation ("androidx.appcompat:appcompat:1.3.1") {
        version {
            strictly '1.3.1'
        }
    }
    ...
}

work for me, but if i not update RN and in app/build.gradle have two appcompat :

implementation ("androidx.appcompat:appcompat:1.3.1") {
        version {
            strictly '1.3.1'
        }
    }

and

implementation 'com.android.support:appcompat-v7:28.0.0'

if I just use androidx.appcompat:appcompat:1.3.1 or I use both of them ??
I'm afraid that the app doesn't support under Android 8.