MITxPro no longer supported by -x mitxpro

[acknowledgeworkimagine]

Subject of the issue
I can't download from mitxpro.mit.edu. I believe it may be due to url for a programm is different.

https://courses.xpro.mit.edu/courses/course-v1:xPRO+SysEngx1+R12/course/

Your environment
Operating System (name/version): Windows 10
Python version: Python 3.8.7
youtube-dl version: 2021.04.17
edx-dl version: 0.1.13
Steps to reproduce
I can see mitxpro is supposed to be supported by switch -x mitxpro, however the courses I have are at the domain https://courses.xpro.mit.edu, in fact mitxpro.mit.edu redirects to xpro.mit.edu.

Expected behaviour
The domain xpro.mit.edu
and https://courses.xpro.mit.edu.
should be supported.

Actual behaviour
edx-dl -u user@domain.com -p password -i -x mitxpro --sequential https://courses.xpro.mit.edu/courses/course-v1:xPRO+SysEngx1+R12/course/
edx_dl version 0.1.13
Building initial headers for future requests.
Getting initial CSRF token.
Did not find the CSRF token.
Logging into Open edX site: https://mitxpro.mit.edu/login_ajax
Traceback (most recent call last):
File "c:\users\coco\appdata\local\programs\python\python38\lib\runpy.py", line 194, in _run_module_as_main
return run_code(code, main_globals, None,
File "c:\users\coco\appdata\local\programs\python\python38\lib\runpy.py", line 87, in run_code
exec(code, run_globals)
File "C:\Users\coco\AppData\Local\Programs\Python\Python38\Scripts\edx-dl.exe_main.py", line 7, in
File "c:\users\coco\appdata\local\programs\python\python38\lib\site-packages\edx_dl\edx_dl.py", line 1008, in main
resp = edx_login(LOGIN_API, headers, args.username, args.password)
File "c:\users\coco\appdata\local\programs\python\python38\lib\site-packages\edx_dl\edx_dl.py", line 230, in edx_login
resp = json.loads(response.read().decode('utf-8'))
File "c:\users\coco\appdata\local\programs\python\python38\lib\json_init.py", line 357, in loads
return _default_decoder.decode(s)
File "c:\users\coco\appdata\local\programs\python\python38\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "c:\users\coco\appdata\local\programs\python\python38\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 4 column 1 (char 3)