Hello Manychat Community,
I'm experiencing an issue with Facebook Messenger Preview for my automation, "Violet Egypt - Sales Assistant."
The problem:
When I select Preview → In Facebook, a blank panel opens showing only the automation name. No preview message arrives in my Facebook Messenger.
However, Preview → In Manychat works correctly and displays the automation flow.
What I've already checked:
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Refreshed Facebook permissions successfully.
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Set Manychat as the default Messenger routing app.
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Verified that both Messenger permissions are enabled: Access standby channel and Take control of conversations.
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Confirmed that messages can be sent and received manually between Manychat Inbox and Facebook Messenger.
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Resumed automated replies for my test contact.
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Tested using Chrome Incognito with both accounts logged in.
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Temporarily disabled Meta Business Suite automated replies, away messages, and FAQs on Messenger to rule out conflicts.
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Confirmed that the automation's starting trigger is connected to the first Messenger message.
Current status:
The automation is saved as Draft. Manual messaging works, but the Facebook preview still does not deliver any messages.
My questions:
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Why does Facebook Preview open a blank panel instead of sending the test automation?
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Is there an additional Messenger conversation ownership setting I need to configure?
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How can I resolve this without publishing my automation?
Any help would be greatly appreciated.
Thank you!