You can no longer use Facebook Messenger with Kit
Due to new limitations imposed by Facebook, Kit can no longer start a conversation with you through Facebook Messenger. If you are a Kit user and you are communicating with Kit by using Messenger, then you won't recieve messages from Kit unless you start a conversation. You can still start a conversation by saying "Hi Kit" on Messenger, but Kit can't message you unless there is an active conversation thread in the last 24 hours.
If you are using Kit through Messenger, then please do one of the following as soon as possible to keep working with Kit:
If you use an iPhone or iPad, then you can install Shopify Ping, a free iOS app that you can use to talk to Kit.
If you use an Android device, then you can change your messaging preference with Kit to SMS.
Learn more about ways to talk to Kit from the Shopify Help Center.