diff --git a/src/danog/MadelineProto/MTProtoTools/Files.php b/src/danog/MadelineProto/MTProtoTools/Files.php
index a0f0be20..f55dd34f 100644
--- a/src/danog/MadelineProto/MTProtoTools/Files.php
+++ b/src/danog/MadelineProto/MTProtoTools/Files.php
@@ -186,7 +186,7 @@ trait Files
                 $res['MessageMedia'] = ['_' => 'messageMediaPhoto', 'photo' => $media];
                 break;
             default:
-                throw new \danog\MadelineProto\Exception('Could not convert media object');
+                throw new \danog\MadelineProto\Exception("Could not convert media object of type {$media['_']}");
         }
 
         return $res;
diff --git a/src/danog/MadelineProto/MTProtoTools/ResponseHandler.php b/src/danog/MadelineProto/MTProtoTools/ResponseHandler.php
index 95f7a054..e5fb8406 100644
--- a/src/danog/MadelineProto/MTProtoTools/ResponseHandler.php
+++ b/src/danog/MadelineProto/MTProtoTools/ResponseHandler.php
@@ -528,7 +528,8 @@ trait ResponseHandler
         unset($request);
         $this->got_response_for_outgoing_message_id($request_id, $datacenter);
         Loop::defer(function () use ($request_id, $response, $datacenter) {
-            $this->logger->logger("Deferred: sent {$response['_']} to deferred");
+            $r = isset($response['_']) ? $response['_'] : json_encode($response);
+            $this->logger->logger("Deferred: sent $r to deferred");
             $this->datacenter->sockets[$datacenter]->outgoing_messages[$request_id]['promise']->resolve($response);
             unset($this->datacenter->sockets[$datacenter]->outgoing_messages[$request_id]['promise']);
         });