Laravel can't run web server after installing example app from Laravel installation media. What could be the possible causes and solutions?

When you encounter an issue where Laravel cannot run the web server after installing an example app from the Laravel installation media, there could be several possible causes. Here are some common issues and their solutions:

PHP version compatibility: Laravel may require a specific version of PHP to run, and if your server's PHP version is not compatible, you may encounter issues. Check the Laravel documentation to determine the required PHP version and ensure that your server meets the minimum requirements.
Apache or Nginx configuration: Laravel can be run on both Apache and Nginx web servers. Ensure that your web server is configured correctly to run Laravel applications. Check the Laravel documentation for the specific configuration instructions for your web server.
Composer installation: Laravel relies on Composer to manage its dependencies. Ensure that Composer is installed and configured correctly on your server. You can check if Composer is installed by running the command composer --version in your terminal.
Permissions: Laravel requires certain permissions to function correctly. Ensure that the ownership and permissions of the Laravel application directory and its subdirectories are set correctly. The web server user should have read, write, and execute permissions for the public directory, and read permissions for the rest of the application directory.
Routes file: Laravel uses a routes file to define the URLs for its application. Ensure that the routes file is correctly located in the app/Http/routes.php file and that it contains the correct routes for your application.
Environment file: Laravel uses an environment file to define application settings such as database credentials and other configuration options. Ensure that the environment file is correctly located in the .env file in the root directory of your application and that it contains the correct settings for your application.
Database connection: Laravel requires a database connection to function correctly. Ensure that your database is correctly configured in the environment file and that your web server user has the necessary permissions to access the database.
Firewall rules: Firewall rules can sometimes block Laravel from running the web server. Ensure that your firewall is configured correctly to allow traffic to the Laravel application.

If none of the above solutions work, you may need to seek further assistance from the Laravel community or your hosting provider.