Solution

Laravel UI

Add the following line to routes/web.php:

Auth::routes();

Breeze

In Breeze, the necessary routes are written in routes/auth.php and are called in web.php.

routes/web.php

require __DIR__.'/auth.php'; // Without this line, the login page returns a 404

JetStream (Fortify)

You can change the configuration in config/fortify.php by setting false to true to display the views.

'views' => true

Steps for Troubleshooting

First, Check the Current Routes

The most common reason for a 404 error when pages do not display is that the routes are not defined.

Run the following command to display the list of currently available routes:

php artisan route:list

If the login or registration pages are not in the list, try the methods mentioned above.

When the Page Displays as a Blank Screen

First, check for errors in the browser console.

To display the console in the browser:

Command + Option + I (Mac)
Ctrl + Shift + J (Windows)

Check for any errors.

If you see an error like:

localhost:5173/app.css 404

This likely means that Vite is not running.

Run the Vite development command:

npm run dev

Conclusion

That's all.

I hope this article helps someone.