fixed the Bus command Handling forwarding the call to a matching Handler class

src/Bus/BusServiceProvider.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Bus;
+
+use Flarum\Foundation\AbstractServiceProvider;
+use Illuminate\Contracts\Bus\Dispatcher as BusContract;
+use Illuminate\Contracts\Queue\Factory as QueueFactoryContract;
+
+class BusServiceProvider extends AbstractServiceProvider
+{
+    public function boot()
+    {
+        $this->app->bind(BusContract::class, function ($app) {
+            return new Dispatcher($app, function ($connection = null) use ($app) {
+                return $app[QueueFactoryContract::class]->connection($connection);
+            });
+        });
+    }
+}