Null pointer exception in EpicGamesCrawler.

[moonstar-x]

crawler-1   | (EpicGamesCrawler @ 2024-08-12 07:34:11 PM): [ERROR] - object of type 'NoneType' has no len() 
crawler-1   |  Traceback (most recent call last):
crawler-1   |    File "/opt/app/pkg/runner/offer_crawler.py", line 38, in run
crawler-1   |     self._execute()
crawler-1   |    File "/opt/app/pkg/runner/offer_crawler.py", line 17, in _execute
crawler-1   |     for offer in result:
crawler-1   |    File "/opt/app/pkg/crawlers/epicgames.py", line 24, in _extract_offers
crawler-1   |     free_elements = [element for element in elements if self._filter_free_element(element)]
crawler-1   |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
crawler-1   |    File "/opt/app/pkg/crawlers/epicgames.py", line 34, in _filter_free_element
crawler-1   |     return len(promotional_offers) > 0 and discount_price == 0
crawler-1   |            ^^^^^^^^^^^^^^^^^^^^^^^
crawler-1   |  TypeError: object of type 'NoneType' has no len()