Could not initialize class org.apache.maven.plugin.war.util.WebappStructureSerializer -Maven Configuration Problem Any solution?

It might because the version of maven-war-plugin is too old in your project.

Try to add below code in your pom.xml

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>3.3.1</version>
</plugin>