2001: Chat not found.
The chat is not available to this account.
HTTP status: 404.
No chat with this id exists for this account and mode; a chat belonging to another account, or in the other livemode, answers identically. Nothing was read, sent or accepted.
Troubleshooting
Section titled “Troubleshooting”- Verify the chat id came from GET /v1/chats or a message this account sent or received, in the same livemode.