Could not find or load main class with a Jar File

I’m trying to load a jar using

@echo off
java -jar Test.jar
pause

With the manifest of

Manifest-Version: 1.0
Main-Class: classes.TestClass

In the Jar directory, I can clearly see a classes\TestClass file when I extract it.

Edit: classes.TestClass does have a public static void main(String[] args).

Package Deceleration in classes.TestClass is package classes;

But I still keep getting the error message

Could not find or load main class classes.TestClass

I’ve been through everything I’ve been able to find with this problem, and none of it seems to help.

I’ve tried editing the classpath, redoing the manifest, installing the new JRE.

What else should I be doing?