Hello, thank you for reaching out!
It sounds like you've already completed the steps described in our article on how to connect your Instagram account to a Conversation API app. We also have an article on how to troubleshoot your Instagram and Conversation API integration.
A few troubleshooting steps are listed below, though we do recommend reading each article to determine what action best meets your needs:
Ensure that the Instagram business account to be integrated with your Conversation API app is already connected to a Facebook Page.
Ensure that you are an admin of the Facebook Page you connected to your Instagram business account. For more information on Page roles, see What are the different Page roles and what can they do?.
When configuring the integration, provide all the necessary permissions to your Conversation API app (as detailed in step 8 of this article).
Review our troubleshooting article if your issue persists.
If you continue to encounter this issue after taking the above troubleshooting steps, please let us know (either via direct message or in a reply to this post).
Let us know if you have any questions, and thank you again for reaching out!
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