The app you shared from doesn't currently support sharing to Stories. Error when sharing to instagram stories.

[MaxJadav]

Need to add support the new feature.

This is due to a Facebook App ID requirement recently enforced by Instagram on January 30, 2023.

You can find their blog post at https://developers.facebook.com/blog/post/2022/10/10/introducing-important-update-to-Instagram-sharing-to-stories/, as well as their developer documentation: https://developers.facebook.com/docs/instagram/sharing-to-stories/.

To fix this issue, you would need to register your app on the Facebook developer console at https://developers.facebook.com/, obtain a Facebook app ID and pass it as the source_application param in your integrations.