It appears that installation of flask-login has issues. Despite a successful install using the below
pip install flask-login
My app.py file
There was yet another transition of the way Flask extensions are imported.
The Flask 0.8 style from flask.ext.login import …
is no longer supported, and the even earlier style from flaskext.login import …
is also no longer supported.
Use this way with Flask 1.0 or later:
from flask_login import LoginManager