Downloading documents via documents API

I am trying to download company research documents via API. For a given document ID, I am trying to use the "https://api.refinitiv.com/data/hvmi/v1/documents/download" endpoint to download the file.

Here is my python script:

import refinitiv.data as rd
rd.open_session()


url='https://api.refinitiv.com/data/hvmi/v1/documents/download/{documentId}'
docid=105077955
request_definition = rd.delivery.endpoint_request.Definition(url=url
                                                             ,method=rd.delivery.endpoint_request.RequestMethod.GET
                                                             ,path_parameters = {"documentId": docid})
response = request_definition.get_data()

Running this, I get a 500 error:

Response(is_success=False, raw=<Response [500 Internal Server Error]>, errors=[Error(code=500, message='')]...

Even when I use the API Playground, I get a "Failed to fetch" error:

Any ideas?