[Python] Getting "Exception has occurred: AssertionError jinja2 must be installed to use...

First, I am new to Python and FastAPI. I created a little project for myself to learn creating several APIs, including using templates. I am working in a virtual environment using VS Code. Running pip freeze confirms that Jinja2 version 3.1.2 is installed in the virtual environment.

(.venv) bash> pip freeze
..
..
Jinja2==3.1.2enter code here
..


I import Jinja2Templates in my main.py at line 15:

from fastapi.templating import Jinja2Templates


and reference this at line 54:

templates = Jinja2Templates(directory="templates")


This works fine when I start uvicorn from the command line in my virtual environment. In an effort to step through and debug my code, I added the following to main.py:

if __name__ == '__main__':
uvicorn.run(app, host='0.0.0.0', port=8000)


When I attempt to debug by clicking on VS Code's "Debug Python File"

Debug Python File

I run into the following exception:

Exception has occurred: AssertionError
jinja2 must be installed to use Jinja2Templates
File "/Users/smb/Documents/VSCode/Python/DBInstances/main.py", line 54, in <module>
templates = Jinja2Templates(directory="templates")


Can anyone tell me what I'm missing and doing wrong?

As requested in first comment, I am pasting in the launch.json contents.

{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "Python: FastAPI",
"type": "python",
"request": "launch",
"module": "uvicorn",
"args": [
"main:app",
"--reload",
"--port",
"8000"
],
"jinja": true,
"justMyCode": true
}
]
}

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