[Python] Spyder can't start because "ModuleNotFoundError: No module named 'ctypes'"

I have this issue when launching Spyder from Anaconda:

Traceback (most recent call last):
File "C:\Documents\anaconda3\Scripts\spyder-script.py", line 6, in <module>
from spyder.app.start import main
File "C:\Documents\anaconda3\Lib\site-packages\spyder\app\start.py", line 21, in <module>
import ctypes
ModuleNotFoundError: No module named 'ctypes'


Can anyone please help me what is the issue? Thank you very much in advance!

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