Meta Ad Library API permission error (subcode 2332004)

I'm creating a datacollector which would fetch data from public available ad in order to retrieve it on my app.

Basically, I would like to create a copycat of the official tool from Meta on my application.

I followed the Meta Ad Library API Guide, generated the user token access and when I make a call (e.g. https://graph.facebook.com/v20.0/ads_archive?ad_reached_countries=["FR"]&search_terms=savon&access_token=MY_TOKEN) I always have this return :

{ "error": {     "message": "Application does not have permission for this action",     "type": "OAuthException",     "code": 10,     "error_subcode": 2332004,     "is_transient": false,     "error_user_title": "App role required",     "error_user_msg": "You need to be assigned a role by the app owner to continue. Learn more at https://developers.facebook.com/docs/development/build-and-test/app-roles",     "fbtrace_id": "AEtWDzYFQypjN8PvUhnHwSQ" } 

I've seen many issues identical to mine (another one here) and I don't really understand as my user is an administrator, of a fully verified business.

I even found people saying it's because the app doesn't have the correct scopes (such as : ads_read, public_profile). I can't add the scope "ads_archive" on my app as I can't see it anywhere in App Review > Permissions and Features on my developer account, otherwise everything seems okay, here is the debug of my token :

{ "data": {     "app_id": "APP_ID",     "type": "USER",     "application": "APPLICATION_NAME",     "data_access_expires_at": 1734880167,     "expires_at": 1727107200,     "is_valid": true,     "scopes": [         "read_insights",         "pages_show_list",         "ads_management",         "ads_read",         "business_management",         "pages_read_engagement",         "pages_read_user_content",         "public_profile"     ],     "granular_scopes": [         {             "scope": "pages_show_list"         },         {             "scope": "ads_management"         },         {             "scope": "ads_read"         },         {             "scope": "business_management"         },         {             "scope": "pages_read_engagement"         },         {             "scope": "pages_read_user_content"         }     ],     "user_id": "USER_ID" } 

}

How to finally access the public data ?