Unable to create ad creative using Facebook graph api

Question

We are trying to create dev environment for fetching ads insights in development mode.

We are able to achieve below items except ad creative & ad creation

Answer 1

The error is saying that you're trying to create an ad where the creative is based on a post which was created by an app in development mode. Because that post won't be visible to anyone other than developers of the app which created the post, that's not allowed.

Create the ad using a post which already exists on the page, or make sure the app you're using to create the posts isn't in development mode (remember, you can use a hidden/unpublished post for the ad)

Again, the problem isn't the 'ad' being created by an app in development mode, its that the post the ad is promoting was created by an app in development mode