Issue with ADXIndicator interacting with numpy

[bszek213]

Traceback (most recent call last):
File "/home/brianszekely/Desktop/ProjectsResearch/technical-analysis-crypto/find_best_strategies.py", line 756, in
main()
File "/home/brianszekely/Desktop/ProjectsResearch/technical-analysis-crypto/find_best_strategies.py", line 683, in main
df_features = ta.add_all_ta_features(
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/ta/wrapper.py", line 589, in add_all_ta_features
df = add_trend_ta(
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/ta/wrapper.py", line 340, in add_trend_ta
indicator_adx = ADXIndicator(
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/ta/trend.py", line 716, in init
self._run()
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/ta/trend.py", line 724, in _run
pdm = _get_min_max(self._high, close_shift, "max")
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/ta/utils.py", line 76, in _get_min_max
output = np.amax([series1, series2], axis=0)
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/numpy/core/fromnumeric.py", line 2827, in amax
return _wrapreduction(a, np.maximum, 'max', axis, None, out,
File "/home/brianszekely/anaconda3/envs/ta/lib/python3.9/site-packages/numpy/core/fromnumeric.py", line 88, in _wrapreduction
return ufunc.reduce(obj, axis, dtype, out, **passkwargs)
TypeError: '>=' not supported between instances of 'float' and 'NoneType'

Is this a known issue in this package or am I missing something?

[jleei]

same error