Use the HttpExceptionInterface rather than a render function here

app/Exceptions/Repository/RecordNotFoundException.php

@@ -2,19 +2,28 @@
 
 namespace Pterodactyl\Exceptions\Repository;
 
-class RecordNotFoundException extends RepositoryException
+use Illuminate\Http\Response;
+use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+
+class RecordNotFoundException extends RepositoryException implements HttpExceptionInterface
 {
     /**
-     * Handle request to render this exception to a user. Returns the default
+     * Returns the status code.
-     * 404 page view.
      *
-     * @param \Illuminate\Http\Request $request
+     * @return int
-     * @return \Illuminate\Http\Response
      */
-    public function render($request)
+    public function getStatusCode()
     {
-        if (! config('app.debug')) {
+        return Response::HTTP_NOT_FOUND;
-            return response()->view('errors.404', [], 404);
     }
+
+    /**
+     * Returns response headers.
+     *
+     * @return array
+     */
+    public function getHeaders()
+    {
+        return [];
     }
 }