Hi everyone,
Posting in case anyone has a fresh angle. I'm hitting the exact error described in @ceglia_carlo's workaround thread — "You can't log in with this Instagram account. Try using a Facebook account that you know is connected to this Instagram account."
Setup:
- IG is linked to the FB Page at Meta Business Suite level, not just Accounts Center
- Tried logging in from my own admin account AND from a second Page admin (different person, different device, different network) — identical error from both
- IG → FB URL rewrite workaround didn't work for us
- Chrome standard, Chrome incognito, mobile Safari — same wall
Posting here first in case:
1. Anyone has another angle I haven't seen in the existing threads.
2. A moderator can flag this for escalation to ManyChat support for the manual migration from the deprecated Instagram OAuth API to the Unified Instagram Onboarding Flow.
Ready to upgrade to Pro the moment this resolves — use case is the Say Hi to New Followers automation.
Tagging @ceglia_carlo, @cata_rendon, @Gustavo Boregio in case any of you have additional context.
