Why do I get a java.util.NoSuchElementException

Question

I am practicing some algorithm problems. While I use Scanner to get some input, my program throws a java.util.NoSuchElementException in thread "main", and I really don't know why. It can compile on my IDE (IntelliJ IDEA) and the outcome is right, but when I submit code on OJ web, it throws the aforementioned exception.

The stack trace with the error message of the exception:

Exception in thread "main" java.util.NoSuchElementException
 at java.base/java.util.ScannerthrowFor(Scannerjava:937)
 at java.base/java.util.Scannernext(Scannerjava:1594)
 at java.base/java.util.Scannernextlnt(Scannerjava:2258)
 at java.base/java.util.ScannernextInt(Scannerjava:2212)
 at Main.main(Main.java:11)

non-zero return = 1

screenshot of my class in the IDE

screenshot of the stack trace in the IDE

My Main class:

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    static int[] nums;
    static int[] b;

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        nums = new int[n];
        b = new int[n];
        for(int i = 0; i < n; ++i)
            nums[i] = sc.nextInt();
        sc.close();

        Arrays.sort(nums);
        for(int i = 0; i < n - 1; ++i)
            b[i] = nums[i + 1] - nums[i];
        Arrays.sort(b,0,n - 1);

        int d = 0;
        for(int j = 0; j < n - 2; ++j){
            d = gcd(b[j],b[j + 1]);
            b[j + 1] = d;
        }

        int ans = (nums[n - 1] - nums[0]) / d + 1;
        System.out.println(ans);
    }
    static int gcd(int a,int b){
        return b == 0? a: gcd(b,a % b);
    }
}

I try to read the source code, but I cannot understand fully the source code. I tried to search for a solution on the web, but I did not find anything about my problem. I would like to know why it throws this exception, and how to fix it to avoid such anomalies.