I got the same problem. I tried in differente environments (node and java) but the error remains.
Hello,
We have received this inquiry on support emails aand team is working on it, get back to you.
Thanks
Sanobar
This error typically occurs when the base64 encoded username:password is not being passed in the Authorization header when calling MLC APIs.
Please verify your authorization header contains the base64 encoded credentials for your app.
Correction in formatting of previous response: This error typically occurs when the base64 encoded username:password is not being passed in the Authorization header when calling MLC APIs.
Please verify your authorization header contains the base64 encoded credentials for your app.