Facebook API. I can't post to my groups. (#200) Insufficient permission to post to group

Question

Facebook API. I can't post to my groups(posts to page works perfect). It happens when Facebook had some updates with permissions(some was deprecated) I have error

'(#200) Insufficient permission to post to group' If I try to post to groups I use Facebook SDK for PHP with new permissions. permissions:

        'email',           
        'pages_read_user_content',
        'pages_read_engagement',
        'pages_manage_posts',
        'publish_video',
        'publish_to_groups',
        'groups_access_member_info'

I updated my business integration on Facebook page

But still doesn't work. Thanks

Answer 1

I'm not sure this is the best solution but it works

It was a solution similar to https://stackoverflow.com/a/68309391/6284256

App Installation is important https://developers.facebook.com/docs/groups-api#app-installation

Group settings -> click to Apps(below on page) -> enter the name "Application" in the search query used during login -> add App

I added screenshots