ClassCastException while AES encryption

[YaroslavHavrylovych]

I'm trying to encrypt data with AES and getting ClassCast. Example:
RxFingerprint.encrypt(EncryptionMethod.AES, getActivity(),mKeyName, data)

java.lang.ClassCastException: android.security.keystore.AndroidKeyStoreRSAPrivateKey cannot be cast to javax.crypto.SecretKey
at com.mtramin.rxfingerprint.AesCipherProvider.getKey(AesCipherProvider.java:60)
at com.mtramin.rxfingerprint.AesCipherProvider.findOrCreateKey(AesCipherProvider.java:54)
at com.mtramin.rxfingerprint.AesCipherProvider.cipherForEncryption(AesCipherProvider.java:75)
at com.mtramin.rxfingerprint.CipherProvider.getCipherForEncryption(CipherProvider.java:84)
at com.mtramin.rxfingerprint.AesEncryptionObservable.initCryptoObject(AesEncryptionObservable.java:83)
at com.mtramin.rxfingerprint.FingerprintObservable.subscribe(FingerprintObservable.java:70)
at io.reactivex.internal.operators.observable.ObservableCreate.subscribeActual(ObservableCreate.java:40)
at io.reactivex.Observable.subscribe(Observable.java:11194)
at io.reactivex.Observable.subscribe(Observable.java:11180)
at io.reactivex.Observable.subscribe(Observable.java:11109)
at com.org.android.monitor.test.LoginFragment.storeAndLogin(LoginFragment.java:140)
at com.org.android.monitor.test.LoginFragment.access$000(LoginFragment.java:34)
at com.org.android.monitor.test.LoginFragment$1.lambda$onResponse$2$LoginFragment$1(LoginFragment.java:203)
at com.org.android.monitor.test.LoginFragment$1$$Lambda$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:754)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:163)
at android.app.ActivityThread.main(ActivityThread.java:6337)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:880)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:770)