Flask reloader crashes with “no module named Scripts\\flask” on Windows

Question

When I run flask run on Windows, I get the following error

C:\Python37\python.exe: No module named C:\Python37\Scripts\flask

This was working previously, the issue started after I created a new env recently.

Answer 1

This is a bug introduced in Werkzeug 0.15.5. Until 0.15.6 is released, you can run with python -m flask run instead to work around it.