Remove app/Http/Middleware/TrustProxies.php as we don't need to subclass it.

app/Http/Kernel.php

@@ -15,7 +15,7 @@ class Kernel extends HttpKernel
      */
     protected $middleware = [
         \Illuminate\Session\Middleware\StartSession::class,
-        \App\Http\Middleware\TrustProxies::class,
+        \Illuminate\Http\Middleware\TrustProxies::class,
         \Fruitcake\Cors\HandleCors::class,
         \Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance::class,
         \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,

app/Http/Middleware/TrustProxies.php

@@ -1,28 +0,0 @@
-<?php
-
-namespace App\Http\Middleware;
-
-use Illuminate\Http\Middleware\TrustProxies as Middleware;
-use Illuminate\Http\Request;
-
-class TrustProxies extends Middleware
-{
-    /**
-     * The trusted proxies for this application.
-     *
-     * @var array|string|null
-     */
-    protected $proxies;
-
-    /**
-     * The headers that should be used to detect proxies.
-     *
-     * @var int
-     */
-    protected $headers =
-        Request::HEADER_X_FORWARDED_FOR |
-        Request::HEADER_X_FORWARDED_HOST |
-        Request::HEADER_X_FORWARDED_PORT |
-        Request::HEADER_X_FORWARDED_PROTO |
-        Request::HEADER_X_FORWARDED_AWS_ELB;
-}