React Native Task :app:validateSigningDebug FAILED You have to regenerate the debug Keystore by running below command:- android/app/ directory: keytool -genkey -v -keystore debug.keystore -storepass android -alias androiddebugkey -keypass android -keyalg RSA -keysize 2048 -validity 10000 React Native Task :app:validateSigningDebug FAILED,