Hello Manychat family,
Due to a Meta incident, some users may experience errors while sending and receiving messages on Instagram.
We are aware of the problem and are already investigating it. We will update you on this incident once there is any news on the subject.
Please check the incident on our Status Page for more info and subscribe for updates: https://status.manychat.com/cm4rsybwl000jejhtz1568myy
Update: Meta has confirmed the incident on their Status Page: https://metastatus.com/ig-messenger
Update 2: Meta reported that the issue should be fixed by now; we are currently monitoring the situation.