Till yesterday the below mentioned code was working fine but now i am facing some problem .
The code opens firefox browser then loads facebook.com but the code is not sending 
email and password to web browser i.e. sendkeys() is not working. 
I verified the id of both textbox of email and password which are correct yet code is not working .

```
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.WebDriver;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
public class Webdriver2 {

    WebDriver driver ;
    JavascriptExecutor jse;
    public void invokeBrowser()
    {
        try
        {
        System.setProperty("webdriver.gecko.driver","C:\\geckodriver-v0.19.0-win64\\geckodriver.exe");
        driver = new FirefoxDriver();
        driver.manage().deleteAllCookies();
        driver.manage().window().maximize();
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        driver.manage().timeouts().pageLoadTimeout(30, TimeUnit.SECONDS );

        driver.get("https://www.facebook.com/");
        search();
        }
        catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }

    }
    public void search()
    {
        try
        {
        driver.findElement(By.id("email")).sendKeys("example@gmail.com"); 
        Thread.sleep(4000);
        driver.findElement(By.id("pass")).sendKeys("password"); 
        Thread.sleep(4000);
        driver.findElement(By.id("u_0_2")).click();
        Thread.sleep(4000);
        /*driver.findElement(By.name("q")).sendKeys("spit mumbai");
        Thread.sleep(4000);
        driver.findElement(By.xpath(" //button[@aria-label='Search' and @data-testid='facebar_search_button'] ")).click();*/

        }
        catch(InterruptedException e)
        {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Webdriver2 w = new Webdriver2();
        w.invokeBrowser();
    }
}

```