Cannot submit final challenge because of error

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        private const string yay = "Yay!";
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");

            //Get user input
            string userInput = Console.ReadLine();

            //Parse input to integer
            int numberOfTimes = int.Parse(userInput);

            //Counter variable to identify how many times the loop has ran
            int counter = 0;


          //Print to screen
            while (numberOfTimes > 0)
            {
                Console.WriteLine(yay);
                counter ++;
            }



        }
    }
}