ldc-gen-game-web/app/Mail/NotifAdmin.php

<?php

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class NotifAdmin extends Mailable implements ShouldQueue
{
    use Queueable;
    use SerializesModels;

    private $msg;

    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($msg)
    {
        $this->msg = $msg;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        $msg = $this->msg;
        return $this->subject(config('app.name') . " : Erreur")->view('front.basic.notif-admin', compact('msg'));
    }
}