Intellij IDEA: ClassNotFoundException

public class Solution
{
    public static void main(String[] args) throws Exception
    {
        int[] array = initializeArray();
        int max = max(array);
        System.out.println(max);
    }
    public static int[] initializeArray() throws IOException {
       int[] mass =new int[20];
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        for(int i = 0; i < mass.length; i ++)
            mass[i]= Integer.parseInt(reader.readLine());
        return mass;
    }
 
    public static int max(int[] array) {
        int max = 0;
        for(int i = 0; i < array.length; i++)
        {
            for(int j = 0; j < array.length; j++)
            {
                if(array[i]>array[j])
                {
                    max = array[i];
                }else{max = array[j];}
            }
        }
        return max;
    }
}

Exception in thread "main" java.lang.ClassNotFoundException: com.javarush.test.level07.lesson04.task01.Solution
    at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:260)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:122)

package com.javarush.test.level07.lesson04.task01