(#200) If posting to a group…

I am trying to set it up with Graph API for posting to a page and i get this error, Mobile API is not an option as every time it locks the Facebook account asking to change password that stops it from posting.

(#200) If posting to a group, requires app being installed in the group, and \ either publish_to_groups permission with user token, or both pages_read_engagement \ and pages_manage_posts permission with page token; If posting to a page, \ requires both pages_read_engagement and pages_manage_posts as an admin with \ sufficient administrative permission

Please advice