TypeError: str() takes at most 1 argument (2 given)

[improvethings]

$ python VeraCracker.py -v veracrypt.file -p dictionary.list
Traceback (most recent call last): ] 0/45698000
File "VeraCracker.py", line 158, in
if crack(p, veracryptPath):
File "VeraCracker.py", line 85, in linuxCrack
out, "utf-8").strip() if out else str(err, "utf-8").strip()
TypeError: str() takes at most 1 argument (2 given)

$ uname -srm
Darwin 17.7.0 x86_64