Traceback (most recent call last):


 "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 796, in extract_info

ie_result = ie.extract(url)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 529, in extract

ie_result = self._real_extract(url)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1989, in _real_extract

encrypted_sig, video_id, player_url, age_gate)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1352, in _decrypt_signature

'Signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):

Traceback (most recent call last):


 "step1b_preprocess_make_train_cubes.py", line 271, in <module>

make_pos_annotation_images_manual()


 "step1b_preprocess_make_train_cubes.py", line 139, in make_pos_annotation_images_manual

images = helpers.load_patient_images(patient_id, settings.LUNA16_EXTRACTED_IMAGE_DIR, "*" + CUBE_IMGTYPE_SRC + ".png")


 "C:\Users\Sangryal\Downloads\sathya\helpers.py", line 78, in load_patient_images

res = numpy.vstack(images)


 "C:\Users\Sangryal\Anaconda3\lib\site-packages\numpy\core\shape_base.py", line 234, in vstack

return _nx.concatenate([atleast_2d(_m) for _m in tup], 0)
ValueError: need at least one array to concatenate