Need help with my song management system

song management system - Google Drive

The link above has all my code for the school final project that i have to do.
Here are the errors that I am getting:
need help with my final coding assignment - YouTube

Why do you think someone will download your files, watch your video and start studying the problems?

Go through the problems one by one. For each create a minimal code to reproduce it. Show the minimal runnable code here. Describe what behaviour you want to get and what you get instead.