Unable to run example_tsk.py

[sayan1999]

After installing the respective dependencies I am unable to run the file example_tsk.py

Error:

python3Traceback (most recent call last):
  File "scikit-fuzzy-tsk-systems/skfuzzy/control/controlsystem.py", line 813, in _process_rules
    raise StopIteration()
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "example_tsk.py", line 29, in <module>
    tipping_ctrl = fcontrol.ControlSystem([rule1, rule2, rule3])
  File "scikit-fuzzy-tsk-systems/skfuzzy/control/controlsystem.py", line 47, in __init__
    self.addrule(rule)
  File "scikit-fuzzy-tsk-systems/skfuzzy/control/controlsystem.py", line 100, in addrule
    for r in self.rules:
  File "scikit-fuzzy-tsk-systems/skfuzzy/control/controlsystem.py", line 768, in __iter__
    self._cache = list(self._process_rules(self.all_rules[:]))
RuntimeError: generator raised StopIteration

Any way out to make it run? Have been using skfuzzy for mamdani, don't want to migrate for TSK. Any guidance will be appreciated :)