Error: 'ConfigParser' object has no attribute '_knobs'

[Mingowzm]

Hi! I tried to recreate the experiments and found this error:

Traceback (most recent call last):
File "train.py", line 160, in
tuner.tune()
File "/home/mingo/Desktop/KnobsTuningEA-master/DB/lib/python3.7/site-packages/autotune/tuner.py", line 110, in tune
self.tune_lhs()
File "/home/mingo/Desktop/KnobsTuningEA-master/DB/lib/python3.7/site-packages/autotune/tuner.py", line 303, in tune_lhs
metrics, internal_metrics, resource = self.env.step_GP(knobs)
File "/home/mingo/Desktop/KnobsTuningEA-master/DB/lib/python3.7/site-packages/autotune/dbenv.py", line 842, in step_GP
flag = self.apply_knobs(knobs)
File "/home/mingo/Desktop/KnobsTuningEA-master/DB/lib/python3.7/site-packages/autotune/dbenv.py", line 179, in apply_knobs
knobs_rdsL = self._gen_config_file(knobs)
File "/home/mingo/Desktop/KnobsTuningEA-master/DB/lib/python3.7/site-packages/autotune/dbenv.py", line 551, in _gen_config_file
cnf_parser.set(key, knobs[key])
File "/home/mingo/Desktop/KnobsTuningEA-master/DB/lib/python3.7/site-packages/autotune/utils/parser.py", line 57, in set
self._knobs[k] = v
AttributeError: 'ConfigParser' object has no attribute '_knobs'

I can not figure out what is going on since the _knobs has been defined in init. Could anyone kindly point out why this happened? I really appreciate it!