same error has occurred #25013 'UnboundLocalError in xtube.py'

[frolex98]

Duplicate of #25013

Hello.
I looked at the source code for the same problem that occurred in ver.2020-09-20.
The problem is the undefined 'source' on line 103.
Since 'source' is defined inside of line 95 'if config', this seems to be a bug that occurs when the definition of line 92 'config' cannot be executed due to some problem.
Maybe you need to insert an exception or set up an appropriate error message.

Traceback (most recent call last):

File "main.py", line 19, in
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpksi3o1r1\build\youtube_dl_init_.py", line 474, in main
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpksi3o1r1\build\youtube_dl_init_.py", line 464, in _real_main
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpksi3o1r1\build\youtube_dl\YoutubeDL.py", line 2019, in download
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpksi3o1r1\build\youtube_dl\YoutubeDL.py", line 797, in extract_info
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpksi3o1r1\build\youtube_dl\extractor\common.py", line 532, in extract
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpksi3o1r1\build\youtube_dl\extractor\xtube.py", line 103, in _real_extract
UnboundLocalError: local variable 'sources' referenced before assignment