How to use sendChecklist for telegram bot?

I send

Request::send('sendChecklist', [
'chat_id' => 'my int id',
'checklist' => json_encode([
    'title' => 'qwerty',
    'tasks' => [
        [
            'id' => 1,
            'text' => 'a',
        ],
        [
            'id' => 2,
            'text' => 'b',
        ]
    ],
]);

via https://github.com/php-telegram-bot/core longman/telegram-bot
comment line in Request::send() before (because this is new feature)

//        self::ensureValidAction($action);

And get response:

LongmanTelegramBotEntitiesServerResponse {#56
  +bot_username: "my bot username"
  +raw_data: array:3 [
    "ok" => false
    "error_code" => 400
    "description" => "Bad Request: PREMIUM_ACCOUNT_REQUIRED"
  ]

Why?
I am premium user.