INSUFFICIENT_PERMISSION issue while updating the record

I have successfully obtained the token and can retrieve records from Netsuite using machine-to-machine authentication. However, I encountered an issue while attempting to update the workOrder record. Below is the error message received, along with a screenshot attached. As a developer, I am unable to resolve this issue. Please assist me in resolving this problem. The administrator has assured me that necessary rights have been granted
Error Details:

• Type: Forbidden
• Status Code: 403
• Error Message: "The workOrder record is only available as a beta record. Enable the REST Record Service (Beta) feature in Setup > Company > Enable Features to work with this record."
• Error Code: INSUFFICIENT_PERMISSION