With Laravel 5.4 Artisan will not run and uses a lot of memory, it worked a long while before with the same versions (besides PHP 7.0.14 to 7.0.15 maybe?).
Probl
It's missing ::class I had the same problem, just like you, one little mistake.
Did a new installation, and this is causing it:
config.php/app
$providers => [
...
Laravel\Cashier\CashierServiceProvider
...
]
from https://laravel.com/docs/5.4/billing
I'm not sure why this is causing it. I have followed the instructions with no implementation (I cannot migrate without artisan running either. This is odd but fixes it for now.