Kindly let us know which python version you are using. The course has been tested with Python 3.8 and if you are using a new or earlier version, there might be issues since sometimes the packages get deprecated.
Also, you are using anaconda, right? I am suggesting an alternative way to launch the environment which many other learners find better in Anaconda.
To know which packages/libraries are installed in your environment, kindly open your Anaconda Navigator and head over to Environments. Here you should see mflix if its been successfully created:
Once you are certain that all packages are installed, kindly head over to Home and select mflix from the dropdown, and then for Jupyter Notebook, click launch:
This should launch the jupyter notebook for the mflix environment. Kindly start the terminal from the jupyter, and before you actually run pytest, kindly make sure to run your app as well in one terminal. Let us know if running the app gives an error or if it starts. It should look like this for no error:
Also, kindly make sure that you have modified your .ini file as per instructions.
Let us know if there’s any confusion in anything. Do send the screenshot of the terminal after running the app as well as of your .ini file in the reply if the problem persists.