Viki.com Download Subtitle Issue

[kiranbabumuddam]

[viki:channel] 36677c: Downloading channel JSON
[viki:channel] 36677c: Downloading episodes JSON page #1
[viki:channel] 36677c: Downloading clips JSON page #1
[viki:channel] 36677c: Downloading clips JSON page #2
[viki:channel] 36677c: Downloading clips JSON page #3
[viki:channel] 36677c: Downloading movies JSON page #1
ERROR: Unable to download JSON metadata: HTTP Error 502: Bad Gateway (caused by <HTTPError 502: 'Bad Gateway'>); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
File "c:\anaconda\lib\site-packages\youtube_dl\extractor\common.py", line 627, in _request_webpage
return self._downloader.urlopen(url_or_request)
File "c:\anaconda\lib\site-packages\youtube_dl\YoutubeDL.py", line 2229, in urlopen
return self._opener.open(req, timeout=self._socket_timeout)
File "c:\anaconda\lib\urllib\request.py", line 532, in open
response = meth(req, response)
File "c:\anaconda\lib\urllib\request.py", line 642, in http_response
'http', request, response, code, msg, hdrs)
File "c:\anaconda\lib\urllib\request.py", line 570, in error
return self._call_chain(*args)
File "c:\anaconda\lib\urllib\request.py", line 504, in _call_chain
result = func(*args)
File "c:\anaconda\lib\urllib\request.py", line 650, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)