Solution
If you are using LabVIEW 2018, the reason of this error is the LabVIEW Python Node does not support network storage in LabVIEW 2018. Move or copy the code you want to call to a local storage.
For LabVIEW 2019 and upper version, this error can also occur due to non-English character is used within the module path. Set the module path to have only English character.