java.lang.ClassNotFoundException: org.docx4j.jaxb.suninternal.NamespacePrefixMapper -Docx4j - docx4j

Question

I updated docx4j from 6.1.2 to 8.0.0 version (https://www.docx4java.org/forums/announces/docx4j-8-0-0-released-t2808.html). I'm using docx4j-JAXB-Internal. When I try to execute, I'm getting the following exception:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Caused by: javax.xml.bind.JAXBException: Can't create internal NamespacePrefixMapper
- with linked exception:
[java.lang.ClassNotFoundException: org.docx4j.jaxb.suninternal.NamespacePrefixMapper]
at org.docx4j.jaxb.NamespacePrefixMapperUtils.getPrefixMapper(NamespacePrefixMapperUtils.java:67)
at org.docx4j.XmlUtils.marshaltoString(XmlUtils.java:850)
... 5 more
Caused by: java.lang.ClassNotFoundException: org.docx4j.jaxb.suninternal.NamespacePrefixMapper
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.docx4j.jaxb.NamespacePrefixMapperUtils.getPrefixMapper(NamespacePrefixMapperUtils.java:63)
... 6 more
Code:
public class VersionTest {
final static Logger logger = Logger.getLogger(VersionTest.class);
public static void main(String args[]) throws Docx4JException {
WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new File("/home/ubuntu/Documents/Projects/Java_Workspace/Version_Test/input/test.docx"));
MainDocumentPart documentPart = wordMLPackage.getMainDocumentPart();
EndnotesPart endnotePart = wordMLPackage.getMainDocumentPart().getEndNotesPart();
FootnotesPart footnotesPart = wordMLPackage.getMainDocumentPart().getFootnotesPart();
CommentsPart comments = wordMLPackage.getMainDocumentPart().getCommentsPart();
logger.info("documentPart Info "+XmlUtils.marshaltoString(documentPart.getJaxbElement(), true, true) );
}}
Help me out to solve the problem. Thanks in advance.