问题 I have a simple message bot that was set up according to the Messenger Platform guide. It has been working fine for the last few months, with about half a dozen messages sent a day. I have not touched it at all, but suddenly, sending a message, ie calling https://graph.facebook.com/v2.6/me/messages?access_token=... , returns: {"message":"(#230) Requires pages_messaging_subscriptions permission to manage the object","type":"OAuthException","code":230,"fbtrace_id":"DVs...."} This was out of the