How to remove errors when I run a code?

Question

When I 've ran the code below. May be a path is wrong, in fopen fuction
https://code.sololearn.com/cYuxTxth1kVm/?ref=app

Answer 1

EGO the below mention code is running fine. Is there any other code which you are referring to.

Answer 2

EGO there are no problems with the path. It is just an illustration about 404 responses (Page not found error)