The error message you're encountering, "ImportError: cannot import name 'Markup' from 'flask'", is likely due to recent changes in Flask and associated libraries. Flask.Markup has been removed in favor of importing Markup from the markupsafe library [1] [6].

To resolve this issue, you should uninstall your current version of Flask and reinstall an older version that supports Flask.Markup, such as Flask 2.3.1 [1]. Alternatively, you can modify your import statement to import Markup from markupsafe instead of flask [6] [8].

Here's an example of how you can modify your import statement:

from markupsafe import Markup

Once you've made this change, you should be able to import Markup without encountering the "ImportError" message.

If you're using Flask-WTF and are still encountering issues, you may need to update Flask-WTF to the latest version, which should resolve the import change to from markupsafe import Markup [4].

It's also worth noting that if you're using a PostgreSQL database with your Flask app, you may encounter additional issues when deploying your app. Make sure to follow best practices when deploying your app, such as those outlined in this tutorial: Deploy a Python Django or Flask web app with PostgreSQL - Azure App Service | Microsoft Learn [5].