that is neither a React function component nor a custom React Hook function. code example
Example 1: React Hook "useState" is called in function "app" which is neither a React function component or a custom React Hook function react-hooks/rules-of-hooks
//Try to capitalize 'app' like
const App = props => {...}
export default App;
Example 2: React Hook "useState" is called in function "app" which is neither a React function component or a custom React Hook function react-hooks/rules-of-hooks
capitalize
const App