How is called this kind of "defect" and how to mitigate? (if possible)

[Bartoloni]

just downloaded but it's doing the same

Failed to evaluate the script:
Python exception: name 'denoise' is not defined
Traceback (most recent call last):
File "src\\cython\\vapoursynth.pyx", line 3365, in vapoursynth._vpy_evaluate
File "src\\cython\\vapoursynth.pyx", line 3366, in vapoursynth._vpy_evaluate
File "C:\Users\Bfield\AppData\Local\Temp\tempPreviewVapoursynthFile23_05_49_117.vpy", line 61, in
clip = beforeEnd(clip)
^^^^^^^^^^^^^^^
File "C:\Users\Bfield\AppData\Local\Temp\tempPreviewVapoursynthFile23_05_49_117.vpy", line 22, in beforeEnd
clipEven = denoise.MCTemporalDenoise(i=clipEven, settings="very high", ncpu=10)
^^^^^^^
NameError: name 'denoise' is not defined