How to fix ModuleNotFoundError: No module named 'watchdog'

ModuleNotFoundError: No module named 'watchdog'
Recommended: Install via pip into your active environment.
python -m pip install watchdog

Verification

Command
python -c "import watchdog; print(watchdog.__version__)"
Expected output
Success! watchdog version x.y.z (e.g., 2.4.0)