Connecting MogoDb Issues

Hi, I am super green and a nubie. So please be kind. I am having issues connecting my Mongodb. I am studying Java from a great teacher, however when I follow his direction I am getting stuck with the following error message in my command promp:

Node.js v18.12.1
[nodemon] app crashed - waiting for file changes before

Any help is greatly appreciated. I cannot move onto m next lesson. SO I am stuck Please help

Is there an associated error?
Have you sourced your env file
Is your uri correct
Can you connect to your db using shell?