laravel 5.7.15 419 Sorry, your session has expired. Please refresh and try again

1. Make sure you hard refresh the page; Clear the cache as well by doing:

   php artisan cache:clear

2. Make sure you have the right permissions for your logs folder:

   chmod -R 755 storage/logs

3. Make sure to generate a key for your application:

   php artisan key:generate

4. Check if, when using post and CSRF you have the web middleware group wrapping your routes;

I solved mine with that! Hope it helps! :D