Clicking SHIFT+CTRL+S in node-js selenium-webdriver

I need to click CTRL+SHIFT+S using Node.js selenium-webdriver I am able to Click CTRL+A but when I do CTRL+SHIFT+S it doesn't work any ideas?

        var driver = new Builder().forBrowser('firefox').setFirefoxService(new firefox.ServiceBuilder("geckodriver.exe")).build();

        await driver.actions({ bridge: true })
          .keyDown(Key.CONTROL)
          .keyDown(Key.SHIFT)
          .sendKeys('s')
          .keyUp(Key.SHIFT)
          .keyUp(Key.CONTROL)
          .perform();