Hi ManyChat Community,
I'm experiencing a serious Facebook Messenger sending issue affecting all five of our Facebook Pages connected to ManyChat.
Public comment replies work correctly, but private Messenger messages are not being sent.
After extensive troubleshooting, I discovered that even manual messages sent directly from ManyChat Inbox fail.
The exact error message is:
"Message is failed to send, please contact Manychat Support"
What I've confirmed
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Incoming Messenger messages appear correctly in ManyChat Inbox.
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Default Reply automation is triggered, but the Sent count remains at 0.
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Manual messages sent from ManyChat Inbox fail with the error above.
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Contacts are marked as Subscribed.
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Public replies to Facebook comments work, but private Messenger replies do not.
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The same private messaging issue also occurs with another service (Page Autoresponder).
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All five Facebook Pages are connected using the same Facebook administrator account.
Troubleshooting already completed
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Refreshed Facebook permissions multiple times.
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Removed and reconnected a Facebook Page.
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Recreated automations from scratch.
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Confirmed ManyChat is the default Messenger Conversation Routing app.
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Verified conversation management permissions.
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Checked Facebook Page Restrictions logs (no notifications).
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Confirmed Facebook connection restoration was successful.
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Tested regular Messenger messages and Facebook comment-triggered private replies.
The issue appears to have started around October 20, 2026, although I'm not certain of the exact date.
My questions
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Has anyone experienced this issue where incoming messages work but all outgoing Messenger messages fail, including manual Inbox replies?
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Could this be caused by a Meta messaging API restriction or permission issue, even when no restrictions appear in ManyChat logs?
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Is there a way to identify the underlying Meta API error code or resolve this without direct support access?
Any suggestions from the ManyChat team or community would be greatly appreciated.
Thank you!
