'path' must be None or a list, not <class '_frozen_importlib_external._NamespacePath'>

I'm trying to run this following code from my SPYDER

from tpot import TPOTClassifier
from sklearn.datasets import load_iris
from sklearn.model_selection import train_test_split
import numpy as np
iris = load_iris()
X_train, X_test, y_train, y_test = train_test_split(iris.data.astype(np.float64),
iris.target.astype(np.float64), train_size=0.75, test_size=0.25)
tpot = TPOTClassifier(generations=5, population_size=50, verbosity=2)
tpot.fit(X_train, y_train)
print(tpot.score(X_test, y_test))
tpot.export('tpot_iris_pipeline.py')

I'm getting this error
WHEN I RUN

> C:\Anaconda3\lib\importlib\_bootstrap.py:219: ImportWarning: can't resolve package from __spec__ or __package__, falling back on __name__ and __path__
return f(*args, **kwds)
Traceback (most recent call last):
File "", line 1, in
tpot.fit(X_train, y_train)

File "C:\Anaconda3\lib\site-packages\tpot\base.py", line 577, in fit
self._fit_init()

File "C:\Anaconda3\lib\site-packages\tpot\base.py", line 485, in _fit_init
ArgBaseClass=ARGType

File "C:\Anaconda3\lib\site-packages\tpot\operator_utils.py", line 159, in TPOTOperatorClassFactory
import_str, op_str, op_obj = source_decode(opsourse)

File "C:\Anaconda3\lib\site-packages\tpot\operator_utils.py", line 72, in source_decode
exec('from {} import {}'.format(import_str, op_str))

File "", line 1, in

File "", line 971, in _find_and_load

File "", line 951, in _find_and_load_unlocked

File "", line 890, in _find_spec

File "", line 864, in _find_spec_legacy

File "C:\Anaconda3\lib\site-packages\pyximport\pyximport.py", line 253, in find_module
fp, pathname, (ext,mode,ty) = imp.find_module(fullname,package_path)

File "C:\Anaconda3\lib\imp.py", line 271, in find_module
"not {}".format(type(path)))

RuntimeError: 'path' must be None or a list, not

Please, I need urgent help... I 've tried to search online for the past 2 days, I can't find the solution.
I want to use tpot to classifier my dataset, but I'm just running this example first to see how to work.