Hi I am trying to do some local testing by using the sandbox credentials from my registered application, but I am getting the OAU-255 error. This application is currently in production, can I not use the sandbox credentials to send a message?
Client ID:5D4LUlgTSOXbmSZdZcemO5
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There is a known issue with the sandbox authentication right now.
The quick workaround solution is to change the app access type from “Private” to “Public” and regenerate a new JWT token for that app (use the app client id).
Try that and let me know if you still face the issue.
Thank you that worked!
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