I was able to get data for page_impressions_by_age_gender_unique metric for my page until yesterday, but its not returning data anymore, there is no error, just the data field is empty. if i use period as empty or as a 'week' it workds, but when i use period as 'day' its not..

Query; https://graph.facebook.com/v20.0/{page-id}/insights?metric=page_impressions_by_age_gender_unique&period=day&access_token=

==== Access Token Info { "perms": [ "email", "read_insights", "pages_show_list", "business_management", "pages_messaging", "instagram_basic", "instagram_manage_comments", "instagram_manage_insights", "instagram_content_publish", "instagram_manage_messages", "pages_read_engagement", "pages_manage_metadata", "pages_read_user_content", "pages_manage_posts", "pages_manage_engagement", "public_profile" ], "page_id": {page-id}, "user_id": "{user-id}", "app_id": {app-id} }

==== Parameters { "metric": "page_impressions_by_age_gender_unique", "period": "day" }

==== Response { "data": [], "paging": "--sanitized--" } ==== Debug Information from Graph API Explorer - https://developers.facebook.com/tools/explorer/?method=GET&path={page-id}%2Finsights%3Fmetric%3Dpage_impressions_by_age_gender_unique%26period%3Dday&version=v20.0