I would have thought this is the same thing but it’s not

I would have thought this is the same thing but it’s not

I’m working on a portfolio project for a basic recommendation software, where I take user inputs and give them a list of recommendations based on those inputs. I’m using a linked list data structure, and I can get part of the program to run. However, I’m currently running into an error that I can’t seem to resolve.

I’m working on a portfolio project for a basic recommendation software, where I take user inputs and give them a list of recommendations based on those inputs. I’m using a linked list data structure, and I can get part of the program to run. However, I’m currently running into an error that I can’t seem to resolve.