I’m currently working at a college and have been tasked with uploading attachments into the pre-defined UD Areas for students via the TASS API.
While we have successfully used several other TASS API endpoints with no issues, this particular endpoint consistently returns an HTTP Status: 501 error. I have confirmed that all required headers and parameters are correctly set, and the request structure aligns with the documentation.
For your reference, I’ve attached a screenshot of the error response we're receiving.
I would greatly appreciate your assistance in identifying what might be causing this issue or confirming whether this endpoint is currently supported.
Looking forward to your response.

I’m currently working at a college and have been tasked with uploading attachments into the pre-defined UD Areas for students via the TASS API.
While we have successfully used several other TASS API endpoints with no issues, this particular endpoint consistently returns an HTTP Status: 501 error. I have confirmed that all required headers and parameters are correctly set, and the request structure aligns with the documentation.
For your reference, I’ve attached a screenshot of the error response we're receiving.
I would greatly appreciate your assistance in identifying what might be causing this issue or confirming whether this endpoint is currently supported.
Looking forward to your response.