Symptom Cause Fix Permission denied when creating vfs.pth. No write access to site-packages. Create a virtual environment (see Prerequisites section). Editor still shows import warnings. Language server cached old state. Restart the language server or reload the editor window. import vfs fails in Python. vfs.pth has wrong paths. Run python3 -c "import sys; print([p for p in sys.path if 'vfs' in p])" to check which paths were added.