Vision - Code 400: Error while downloading

I keep hitting 400: Error while downloading error for some URLs. However, these URLs open just fine on my browser and via curl.

As an example:

openai.BadRequestError: Error code: 400 - {‘error’: {‘message’: ‘Error while downloading [LINK].’, ‘type’: ‘invalid_request_error’, ‘param’: None, ‘code’: ‘invalid_image_url’}}

Any idea what might be going on here?