Clear your browser's cache. How to do this using Chrome (Windows) as an example:
1. go to Settings > Additional> Privacy and Security > Clear History;
2. select the required time range and tick the box next to "Images and other cached files";
3. or use the CTRL+SHIFT+DEL key combination.
Contact technical support via a widget in the corner of the screen.
In order for the integration to work correctly, check the settings of the Facebook page: it is necessary that auto-replies within the social network are disabled.
Enable filter under My Chats or All Chats. Available filters: active chats only; only those chats where there is an unread message from a client; chats with specified tags; chats…