Is the problem from mongo or what

Tell us what’s happening:
so i got this code from a guy it working for him but when i use it it does not work
and i got this from this guy Exercise Tracker - Replit

Your project link(s)

solution: boilerplate-project-exercisetracker - Replit

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36

Challenge: Exercise Tracker

Link to the challenge: