Cannot execute the ransomeware

[AqibMukhtar]

I am having difficulty in executing this ransomware. I have installed all the dependencies and have built binaries. After that, I am unable to understand what to do. I ran main.py and got this error
Traceback (most recent call last):

   File "main.py", line 148, in <module>
	menu()
   File "main.py", line 110, in menu 
	aes_keys_and_base64_path= start_encryption(files)
   File "main.py", line 69, in start_encryption
	base64_new_file_name = base64.b64encode(new_file_name)
   File "/usr/lib/python3.6/base64.py" , line 58, in b64encode
	encoded = binascii.b2a_base64(s, newline=False )
TypeError: a bytes-like object is required, not 'str'

Can someone provide step by step procedure to execute this ransomware correctly?
Thanks in advance