UnicodeDecodeError: 'utf-8' codec can't decode byte 0x9a in position 6209: invalid start byte

[AlexSokokoliuk]

What should I do with that?

Traceback (most recent call last):
  File "pyhammer.py", line 864, in goToMain
    main(self.options)
  File "pyhammer.py", line 68, in main
    for i, line in enumerate(infile_init):
  File "C:\Users\alexs\Anaconda3\lib\codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x9a in position 6209: invalid start byte