403 Forbidden Error

[roman-ku]

I am getting a 403 forbidden error. What am I doing wrong?

Traceback (most recent call last):
  File "C:\Users\johndoe\Desktop\youtube-watch-it-later\get_subs.py", line 184, in <module>
    raise error
  File "C:\Users\johndoe\Desktop\youtube-watch-it-later\get_subs.py", line 180, in <module>
    do_it()
  File "C:\Users\johndoe\Desktop\youtube-watch-it-later\get_subs.py", line 122, in do_it
    playlists = get_playlists(get_channel_for_user(username))
  File "C:\Users\johndoe\Desktop\youtube-watch-it-later\get_subs.py", line 64, in get_playlists
    response = urlopen(url+next_page)
  File "C:\Program Files\Python35\lib\urllib\request.py", line 162, in urlopen
    return opener.open(url, data, timeout)
  File "C:\Program Files\Python35\lib\urllib\request.py", line 471, in open
    response = meth(req, response)
  File "C:\Program Files\Python35\lib\urllib\request.py", line 581, in http_response
    'http', request, response, code, msg, hdrs)
  File "C:\Program Files\Python35\lib\urllib\request.py", line 509, in error
    return self._call_chain(*args)
  File "C:\Program Files\Python35\lib\urllib\request.py", line 443, in _call_chain
    result = func(*args)
  File "C:\Program Files\Python35\lib\urllib\request.py", line 589, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 403: Forbidden
PS C:\Users\johndoe\Desktop\youtube-watch-it-later>

[NicoHaase]

Have you tried running the program once more? For me, this has always worked out, as the error pops up every now and then

[ede1998]

I had the same issue and solved it:
The problem was that the Youtube API was not enabled for my API key/project.
You can do this by going to https://console.developers.google.com/apis/library/youtube.googleapis.com , selecting your project and enabling the API.

Alternatively (that's how I found out about this), you can do your own local request with curl etc.
curl 'https://www.googleapis.com/youtube/v3/channels?part=id&forUsername=<SOMECHANNELNAME>&key=<YOURAPIKEY>'
This should give you more information about the error (I found the link to enable the Youtube API there.)