Intellij Ultimate + Python Not Referencing Module in Imported Package

I am using the new version of Intellij Ultimate (2018.1) and have the Python plugin enabled. I created a virtual environment and have selected it. I have installed Flask and I am trying simply do: from flask import Flask. Intellij can import flask but it cannot recognize Flask. This is very strange. Is there some sort of setting that I am missing? Here are some screen shots:

SDK I am using:

I select it:

I can see flask in site-packages. And in __init__ file in flask there is an import statement for Flask in app.py

But Flask module is not found. And if I do just an 'import flask', I will get a tip to import flask.Flask but Flask will still not be recognized.