I\'ve been successfully running the local development server daily and have made no changes except that I called \"gcloud components update\" just before it stopped working.
On Windows, dev_appserver.py %CD% is enough if your .yaml file has the default app.yaml name. Otherwise dev_appserver.py %CD%/your-file-name.yaml
dev_appserver.py %CD%
app.yaml
dev_appserver.py %CD%/your-file-name.yaml