Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-node@v3, actions/cache@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

'elapsedTime' is already declared in the upper scope on line 6 column 10

'React' must be in scope when using JSX

'React' must be in scope when using JSX