I am new to react-native or you can say new to React and I am working on react-native navigation I have installed all the required libraries as instructed in

CodePudding user response：

If you have installed your app following the react native cli guide you might want to try running

gradle clean

in your android folder und then try to run your app in the emulator again.

On my first steps with react native I stumpled upon the same issue. :-)