Traceback (most recent call last):


 "<stdin>", line 1, in <module>
AttributeError: module 'tabula' has no attribute 'environment'


Traceback (most recent call last):


 "./udemy-dl/udemy-dl.py", line 607, in <module>

main()


 "./udemy-dl/udemy-dl.py", line 591, in main

skip_hls_stream=args.skip_hls_stream,


 "./udemy-dl/udemy-dl.py", line 354, in course_download

quality,


 "./udemy-dl/udemy-dl.py", line 81, in download_lecture

lecture = lecture.get_quality(quality)

AttributeError: 'NoneType' object has no attribute 'get_quality'
