The following exception occurred:
No supported encrypter found. The cipher and / or key length are invalid.
php artisan key:generate
It's possible you get this exception:
If so, create a new .env file:
cp .env.example .env
Try to generate the key again.
Application key set successfully.
APP_KEY should now be set in .env automaticly.
You can also set this key in 'config\app.php' :
'key' => env('APP_KEY')
'key' => '[base64:******]'