KeyStore exception

[boykoy96bg]

when i run android project, i found error. Can you help me fix it, thanks you

  W/KeyStore: KeyStore exception
android.os.ServiceSpecificException:  (code 7)
    at android.os.Parcel.createExceptionOrNull(Parcel.java:2387)
    at android.os.Parcel.createException(Parcel.java:2357)
    at android.os.Parcel.readException(Parcel.java:2340)
    at android.os.Parcel.readException(Parcel.java:2282)
    at android.security.keystore.IKeystoreService$Stub$Proxy.get(IKeystoreService.java:988)
    at android.security.KeyStore.get(KeyStore.java:233)
    at android.security.KeyStore.get(KeyStore.java:222)
    at android.security.keystore.AndroidKeyStoreSpi.engineGetCertificate(AndroidKeyStoreSpi.java:160)
    at java.security.KeyStoreSpi.engineEntryInstanceOf(KeyStoreSpi.java:583)
    at java.security.KeyStore.entryInstanceOf(KeyStore.java:1631)
    at org.thoughtcrime.securesms.crypto.KeyStoreHelper.hasKeyStoreEntry(KeyStoreHelper.java:146)
    at org.thoughtcrime.securesms.crypto.KeyStoreHelper.getOrCreateKeyStoreEntry(KeyStoreHelper.java:81)
    at org.thoughtcrime.securesms.crypto.KeyStoreHelper.seal(KeyStoreHelper.java:50)
    at org.thoughtcrime.securesms.crypto.DatabaseSecretProvider.createAndStoreDatabaseSecret(DatabaseSecretProvider.java:83)
    at org.thoughtcrime.securesms.crypto.DatabaseSecretProvider.getOrCreate(DatabaseSecretProvider.java:43)
    at org.thoughtcrime.securesms.crypto.DatabaseSecretProvider.getOrCreateDatabaseSecret(DatabaseSecretProvider.java:26)