I am getting error 
org.openqa.selenium.WebDriverException: Unable to convert: {actions=[org.openqa.selenium.interactions.Sequence@737edcfa, org.openqa.selenium.interactions.Sequence@3ecedf21]}
Code snippets
 Actions action = new Actions(driver);
        action.keyDown(Keys.CONTROL).click(DBOCHCorLang).click(DBOCHCorLangSel).build().perform();