Can not get the group article.

[chunchiehdev]

I'm trying to use the following code to extract posts from a private group, but it's not working. Nothing is being printed out. Can someone help me?

from facebook_scraper import get_posts
group_id = '1740036226559286'
try:
    for post in get_posts(group=group_id, cookies='cookies.txt'):
        try:
            print(post['text'][:50])
        except KeyError:
            print("error")
except Exception as e:
    print(f"error: {e}")