React Native "Cannot find module 'react-native'" Problem - react-native

Question

I installed react-native and the global cli.
But when I run npm start, I'm having this error:
Cannot find module 'react-native'
Here is my App.js file. Thank you...
import React from "react";
import { SafeAreaView, View, Text } from "react-native";
function App() {
return (
<SafeAreaView
style={{
flex: 1,
alignItems: "center",
justifyContent: "center",
}}
>
<View
style={{
flex: 1,
alignItems: "center",
justifyContent: "center",
}}
>
<View style={{ flex: 3 }}>
<Text>Kayıt Listesi</Text>
</View>
</View>
</SafeAreaView>
);
}
export default App;

Answer 1

Execute the following steps:
Remove your node_modules directory.
Run npm install.
Run npm start.
The command npm install install everything your project needs into the node_modules directory.
If this does not help, try to add react-native individually by executing the command npm install react-native --save.
It is usually a good idea to initialize a new project using npm init, which creates a package.json file in which npm stores names and versions of all installed packages.
Edit: After we have investigated the whole stack trace it is apparent that we need to install react-native-web via the command npm install react-native-web.