You should if you nginx contains the rewrites or if you have apache, check if an .htaccess file is available. From what I can see, it looks like a problem with the rewrites.

If you cached your routes, then try to run this:

php artisan route:cache

or don't cache them at all

php artisan route:clear

I have the exact the same problem.
I tried "php artisan route:cache" and "php artisan route:clear" but the problem is tstill there,

I'm running xampp with apache and I have a .htaccess file in the public directory (that laravel created I think)

It looks like this:

RewriteEngine On  

##Redirect Trailing Slashes If Not A Folder...  
RewriteCond %{REQUEST_FILENAME} !-d  
RewriteRule ^(.*)/$ /$1 [L,R=301]  

##Handle Front Controller...  
RewriteCond %{REQUEST_FILENAME} !-d  
RewriteCond %{REQUEST_FILENAME} !-f  
RewriteRule ^ index.php [L]  

Is it any problem in that one?

Find the problem myself.
If you are running apache in xmapp It wont work

But if you start the server with 'php artisan serve --port=80' it works

Check if the Rewrite module is active and relevant htaccess had AllowOverride set correctly.