WARNING: Automatic signature extraction failed: Traceback (most recent call last):

 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 955, in _decrypt_signature
return func(s)

 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 523, in <lambda>
return lambda s: initial_function([s])

 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 518, in resf
res = interpret_statement(stmt, local_vars)

 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 453, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)

 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 506, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type
youtube-dl -U
to update.
Traceback (most recent call last):


 "/home/user/telegram/lib/python3.7/site-packages/telethon/utils.py", line 303, in get_input_media

if media.SUBCLASS_OF_ID == 0xfaf846f4:
# crc32(b'InputMedia')
AttributeError: 'NoneType' object has no attribute 'SUBCLASS_OF_ID'
