Getting error "java.lang.NoClassDefFoundError: com/gargoylesoftware/htmlunit/html/HtmlElement"
Add below dependency to your pom.xml file and it should work fine
<groupId>org.seleniumhq.selenium</groupId><artifactId>htmlunit-driver</artifactId><version>2.20</version></dependency>Since 2.53 this is no longer shipped with webdriver
If you are using Selenium main distribution package version 2.53 or later then you should add HtmlUnitDriver separately, it's no longer bundled with the standalone jar file.
If you are using Selenium 2.52 or earlier you don't need to download and install HtmlUnitDriver, it is already there.
Please make the changes accordingly, it should work fine. Learn more.