What this means in a real publishing workflow
Instagram publishing through Meta requires an eligible professional account connected to the correct Facebook login. Personal Instagram accounts are not interchangeable with Business or Creator accounts for API publishing.
Recommended implementation
- Confirm the selected Instagram account appears in Postifys connections.
- Verify the Facebook login still manages the linked assets.
- Use a supported image or Reel format and a public media URL.
- Reconnect Meta when permissions or managed assets change.
How to verify the fix
Test with one simple image before debugging a large Reel. This separates account and permission problems from video codec, duration, or remote-download problems.
Related Postifys resources
API documentation · Error reference · n8n automation guide · Safe retry guide · Compatibility matrix