We reported the issue about Customer Chat Widget Methods to Facebook and will work with them on the fix, but there is no ETA.

A fix has been implemented, all growth tools are now working correctly.

Due to the Facebook issue, Customer Chat Widget Methods still aren't working: https://github.com/manychat/growth-tools-library-api-docs#customer-chat-widget-methods

Such widgets as Customer Chat, Slide-In, Modal, Bar, Button, and Box currently aren't displayed at websites.

If Customer Chat is disabled, all other widgets will be displayed correctly.

Additionally, Messenger buttons do not appear at Landing Page GTs. We are investigating the source of the issue.