Index out of range when running sportflow

[cif2cif]

Describe the bug
I have just installed sportflow and following the readme I get an error 'index out of range'.

To Reproduce
Steps to reproduce the behavior:

1. Execute sflow -pdate 2016-03-01
2. See error
   Traceback (most recent call last):
   File "/home/cif/anaconda3/bin/sflow", line 8, in
   sys.exit(main())
   File "/home/cif/anaconda3/lib/python3.8/site-packages/alphapy/sport_flow.py", line 678, in main
   args = parser.parse_args()
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 1771, in parse_args
   self.error(msg % ' '.join(argv))
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 2519, in error
   self.print_usage(_sys.stderr)
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 2489, in print_usage
   self._print_message(self.format_usage(), file)
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 2455, in format_usage
   return formatter.format_help()
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 282, in format_help
   help = self._root_section.format_help()
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 213, in format_help
   item_help = join([func(*args) for func, args in self.items])
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 213, in
   item_help = join([func(*args) for func, args in self.items])
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 320, in _format_usage
   action_usage = format(optionals + positionals, groups)
   File "/home/cif/anaconda3/lib/python3.8/argparse.py", line 395, in _format_actions_usage
   start = actions.index(group._group_actions[0])
   IndexError: list index out of range

Expected behavior
See sportflow output.

Desktop (please complete the following information):

• OS: [e.g. iOS] Ubuntu 20.10
• Browser [e.g. chrome, safari] NA
• Version [e.g. 22] NA