numba: ImportError: Numba could not be imported

After installing numba on Win7, the test does not work:

C:\Windows\System32>python3 -m numba -s
Traceback (most recent call last):
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\core\typeco
nv\typeconv.py", line 4, in <module>
    from numba.core.typeconv import _typeconv
ImportError: DLL load failed: No se puede encontrar el módulo especificado.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\runpy.py", line 183, in _run_mo
dule_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\runpy.py", line 142, in _get_mo
dule_details
    return _get_module_details(pkg_main_name, error)
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\runpy.py", line 109, in _get_mo
dule_details
    __import__(pkg_name)
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\__init__.py
", line 20, in <module>
    from numba.misc.special import (
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\misc\specia
l.py", line 3, in <module>
    from numba.core.typing.typeof import typeof
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\core\typing
\__init__.py", line 1, in <module>
    from .context import BaseContext, Context
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\core\typing
\context.py", line 11, in <module>
    from numba.core.typeconv import Conversion, rules
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\core\typeco
nv\rules.py", line 2, in <module>
    from .typeconv import TypeManager, TypeCastingRules
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\site-packages\numba\core\typeco
nv\typeconv.py", line 17, in <module>
    raise ImportError(msg % (url, reportme, str(e), sys.executable))
ImportError: Numba could not be imported.
If you are seeing this message and are undertaking Numba development work, you m
ay need to re-run:

python setup.py build_ext --inplace

(Also, please check the development set up guide http://numba.pydata.org/numba-d
oc/latest/developer/contributing.html.)

If you are not working on Numba development:

Please report the error message and traceback, along with a minimal reproducer
at: https://github.com/numba/numba/issues/new

If more help is needed please feel free to speak to the Numba core developers
directly at: https://gitter.im/numba/numba

Thanks in advance for your help in improving Numba!

The original error was: 'DLL load failed: No se puede encontrar el módulo especi
ficado.'
--------------------------------------------------------------------------------

If possible please include the following in your error report:

sys.executable: C:\PROGRA~1\QGIS3~1.12\bin\python3.exe


C:\Windows\System32>