check_files() does not return

[FionaLH4E]

Hey I tried creating a client
client = SauceNao(directory=image_directory, databases=SauceNaoDatabase.All, minimum_similarity=90, combine_api_types=False, api_key=API_KEY, is_premium=False, exclude_categories='', move_to_categories=False, use_author_as_category=False, output_type=SauceNao.API_HTML_TYPE, start_file='', log_level=logging.ERROR, title_minimum_similarity=90)
and
results = client.check_file(file_path)
does not seem to produce any results...