Here are a few things you can try:
Check the URL of the API endpoint: Make sure the URL you're using to access the API is correct and includes the correct path to the API endpoint.
Check the API route: Verify that the API endpoint is defined in the route file and that it is mapped to the correct controller method.
Check the controller method: Make sure the controller method that handles the API request is functioning correctly and returning the expected data.
Enable error logging: Laravel has a built-in logging system that can help you identify the cause of the error. To enable error logging, you can add the following code to the .env file: APP_LOG=debug
Check server permissions: Make sure the server has the correct permissions to access the API files. If the server does not have the correct permissions, you may receive a 404 Not Found error.
Clear cache: Try clearing the cache by running the following command: php artisan cache:clear