Does anyone know how to solve this? I tried many things, but none of them worked.
And when I click more details I get this:
at sun.security.provider.
You can generate the debug keystore by running this command in the android/app/ directory: keytool -genkey -v -keystore debug.keystore -storepass android -alias androiddebugkey -keypass android -keyalg RSA -keysize 2048 -validity 10000
Or just download from official template https://raw.githubusercontent.com/facebook/react-native/master/template/android/app/debug.keystore