Import error with __init__.py

[SamuelCh-Git]

import protease_activity_analysis as paa

File "C:\Users\USER\miniconda3\envs\paa\lib\site-packages\statsmodels\tsa\statespace\tools.py", line 14, in
from . import (_initialization, _representation, _kalman_filter,
ImportError: cannot import name 'initialization' from 'statsmodels.tsa.statespace' (C:\Users\USER\miniconda3\envs\paa\lib\site-packages\statsmodels\tsa\statespace_init.py)

Any suggestion