I am learning FastApi and while running the code uvicorn main:app --reload inside app directory on cmd below issue occurs

My folder structure

I am Stuck in this issue and have no idea what is happening.
Thanks in advance.
I am learning FastApi and while running the code uvicorn main:app --reload inside app directory on cmd below issue occurs

My folder structure

I am Stuck in this issue and have no idea what is happening.
Thanks in advance.