Help me in solving ADVPPY147 problem

help
,
1

My issue

error mistake can identify

My code

def user_function():
    # Open the file for reading
    file_path = "/mnt/codechef/numbers.txt"
    sum_val = 0
    try:
        with open(file_path, 'r') as reader:
            for line in reader:
                num = int(line.strip())
                sum_val += num
        # Close the file
        print("Sum:", sum_va)
    except IOError as e:
        print(e)

Learning course: Python Programming
Problem Link: Coding problem - 2 in Python Programming