Caused by: java.lang.ClassNotFoundException: org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook$Factory

This error message suggests that a Java class called "org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook$Factory" cannot be found.

This class is part of the Apache POI library, which is used to read and write Microsoft Office files (such as Excel spreadsheets) in Java.

To resolve this error, you should make sure that you have the correct version of the Apache POI library in your Java classpath. You can download the latest version of the library from the Apache POI website and add it to your project's dependencies.

If you are using a build tool like Maven or Gradle, you can add the Apache POI dependency to your project's build file and let the build tool manage the library for you.

Alternatively, you may need to check that the classpath is set up correctly in your environment. Make sure that the necessary JAR files are included in the CLASSPATH environment variable or specified in the command line when running your Java program.