问Laravel:期望响应250，但得到"“with message "”

EN

Expecting response 250 but got "" with message ""

        if ($circle->business)
        {
            $email = $circle->creator->email;
            $name = $circle->creator->fullName();
        }
        else
        {
            $email = $user->email;
            $name = $user->fullName();
        }

        Mail::send('layouts.'.$this->client->template->file.'.views.emails.transaction-receipt', compact('user'), function($message) use($user)
        {
            $message->from($user->account->email, $user->account->name);
            $message->to($user->email, $user->name)->subject($user->account->name.' Transaction Receipt');
        });