at java.net.URLClassLoader.findClass(URLClassLoader.java:382)

This exception is thrown when the Java Virtual Machine (JVM) is unable to find a class using a URLClassLoader. The URLClassLoader is used to load classes from a specified set of URLs.

The exception is typically caused by one of the following reasons:

1. The class is not present in the specified URLs.
2. The class is present in the specified URLs but is not in the correct package or directory structure.
3. The class is present in the specified URLs but has not been compiled or packaged correctly.
4. There is a conflict between different versions of the same class.

To resolve this exception, you should check the following:

1. Check that the class is present in the specified URLs.
2. Check that the class is in the correct package or directory structure.
3. Check that the class has been compiled and packaged correctly.
4. Check for conflicts between different versions of the same class.

If you are still unable to resolve the issue, you should seek help from a Java developer or post a question on a Java forum.