What could be the reason for fatal python error:initfsencoding:unable to load the file system codec?
Solution 1:
Fixed in 4c18633.
The problem is that for version x64 for Python 3.7 it is not working due to class config for freezer.py.
You need to go cx_Freezer installation folder. If you have a virtual environment, go to your environment folder \lib\site-packages\cx_Freeze,
find the freezer.py and add the code found on the commit.
You can find the patch at GitHub