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Twilio Programmable Chat - Access denied (code: 54007) for old chats

We are using Twilio Programmable Chat on our project for 1 year. On the mobile side we use twilio-chat v.6.0.0 SDK. On the backend side we use java library - com.twilio.sdk:twilio:7.51.0

Problem

But a couple of days ago we started experiencing problems with authorization on the mobile side. Everything is ok when we create new chats and work with them.

But when we try to fetch messages for the old chats (created before that problems), we receive the following error access forbidden for identity (status: 403, code: 54007)

What we tried

  • We tried to upgrade/downgrade both mobile SDK and backend libraries.
  • I've read the code: 54007 documentation. We have never configured any Sync services, possible they were introduced and not properly configured for the old chats?
  • We have only one Sync service that was created (automatically) recently and ACL enabled flag is set to false.

Twilio sync service settings

Here is the structure of our access token: Access token structure

My guess is that something has recently been changed with the permissions in the Chat API and the default config is not working for us.

I don't know exactly what it could be. Please, help.

Solution

  • This is the official answer from Twillio Support that helped us:

    Recently the engineering team has effectively deployed some modifications over Programmable Chat; before this change, users would be able to see channel messages that they were not part of. With this update, users will receive error code 54007 for Chat if they try to read any channel that they are not a member of.