I'm looking to help the engineering team implement Conversions API for two regions and the ecommerce platform is powered by Hybris SAP. Any guides or quickstarts?

HI, I'm creating an app(META APP) that runs ads using the Business/Marketing API and then I have a question.
First, I created a system user (SU) in my business (B). After that, I want to install the app(META APP) to system user(SU) However, when I run post /applications, I get the following error: Unsupported request - method type: post. (https://developers.facebook.com/docs/marketing-api/system-users/install-apps-and-generate-tokens?locale=en_US#TOS)
The business app id is test app id. Access token is the test app administrator's access token that create via meta tool access token(developers.facebook.com/tools/accesstoken) System user is created with admin privileges. And In the web ui meta app, i can see admin user and test users, But when i request get {app_id}/roles api, i can not see admin user. only selected test users.
What should I do?

Hi, I am experiencing an issue with managing my audiences in Meta Ads Manager. Some of the Custom Audiences I have created are showing the status "Pending," and their audience size is marked as "Size temporarily unavailable." This has been the case since their creation, even though their availability status is marked as "Ready."
Here are some details about the issue:
One of the affected audiences is "Addtocart 180 jours," created on 07/10/2024 at 11:43 PM. This issue also seems to affect other audiences based on website traffic or custom events. The problem prevents me from estimating the size of these audiences properly, which impacts my ability to launch campaigns effectively.
so when I spoke with the marketing team, they told me that you had a problem collecting “conversio api” data, so I'd have to check with the technical team. all the while knowing that my API conversion was configured using the Stape-GTM-GA4 method. so is it possible to have an appointment with the meta technical team? thank you!

How to retrieve the 'result type' field in the exported Excel file from the API？Either the location where the conversion occurred, or the active events.

When executing Conversion API, We have been receiving the following error message:
{"error":{"message":"Unsupported post request. Object with ID '232743414474413' does not exist, cannot be loaded due to missing permissions, or does not support this operation. Please read the Graph API documentation at https:\/\/developers.facebook.com\/docs\/graph-api","type":"GraphMethodException","code":100,"error_subcode":33,"fbtrace_id":"ADg7QWTo9fzb1ExdutQXrgT"}}
We’re using a system user to execute the API and have assigned access permissions to the dataset in question, the same way we’ve done for other datasets where the API works fine.
Could you please let us know what might be causing this issue and suggest any steps to resolve it?