The error message you are seeing indicates that the client with the specified object ID does not have the required permissions to perform the specified action on the specified scope in Azure Container Service.
To resolve this issue, verify that you have the required permissions to perform the specified action on the specified scope. You can check your permissions in the Access control (IAM) section of your subscription or management group in the Azure portal.
Let me know in the comments if you have further questions. Comment is the fastest way to reach the experts for any questions or help you need.
Please don’t forget to Accept Answer and hit Yes for "was this answer helpful" wherever the information provided helps you, this can be beneficial to other community members for remediation for similar issues.