NullPointerException when running tests in different feature files and step definitions files

I did not have this issue when I had all the tests in 1 feature file and 1 step definition file. However I decided to start splitting the tests and created 2 feature files and 2 step definitions files. However, I am getting NullPointerException error.

I am using a global variables class to initialize browser and set driver, as per the below.

public class globalVariables {
public WebDriver driver;
public Properties prop;
public WebDriver initializeDriver() throws IOException
{
prop= new Properties();
String browserName= "chrome";
String pathToDriver = "";
if(browserName.equals("chrome"))
{
pathToDriver = "C://Repositories//webDrivers//chromedriver_win32_85.83//chromedriver.exe";
System.setProperty("webdriver.chrome.driver", pathToDriver);
driver= new ChromeDriver();
driver.manage().window().maximize();
//execute in chrome driver
}
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
return driver;
}
}

Login Feature File (which runs first, because of opening of browser etc..)

 @SmokeTest
@Login
Feature: Queries SmokeTest
Scenario Outline: Login using Chrome
Given I open Chrome
And I browse to Queries
When I login to Queries using "<username>" and "<password>"
And Verify that user is successfully logged in
Then Close Browser
Examples:
| username |  password |
| user1|  pass1 |
| user2|  pass2 |

Step definition for the Login Feature file

public class login_steps extends globalVariables {
@Given("I open Chrome")
public void iOpenChrome() throws Throwable {
driver = initializeDriver();
// throw new PendingException();
}
@When("I browse to Queries")
public void iBrowseToQueries() {
driver.get("https://qry.com/");
// throw new PendingException();
}
@When("I login to Queries using {string} and {string}")
public void i_login_to_queries_using_and(String string, String string2) {
driver.findElement(By.id("UserName")).sendKeys(string);
driver.findElement(By.id("Password")).sendKeys(string2);
driver.findElement(By.id("btnLogin")).click();
}
@Then("Verify that user is successfully logged in")
public void verifyThatUserIsSuccessfullyLoggedIn() {
WebElement HomeButton = driver.findElement(By.id("divHomeLink"));
Assert.assertEquals(true, HomeButton.isDisplayed());
}
@And("Close Browser")
public void closeBrowser() {
driver.quit();
}

}

Search Feature file

 @SmokeTest
@Search
Feature: Queries SmokeTest
Scenario: Search Function
Given I open Chrome
And I browse to Queries
Then I login to Queries using "user1" and "pass1"
And Click on Queries Search button
And Enter keyword
And Click Search
Then Close Browser

Search step definition file

public class search_steps extends globalVariables {
@And("Click on Queries Search button")
public void clickOnQueriesSearchButton() {
driver.findElement(By.id("imgSearchQueries")).click(); //ERROR IS HERE
}
@And("Enter keyword")
public void enterKeyword() {
driver.findElement(By.id("txtKeywords")).sendKeys("Smoke Query");
}
@And("Click Search")
public void clickSearch() {
driver.findElement(By.className("btn-search")).click();
}
}

You need to make sure you are using same chrome driver instance for all classes otherwise Null point exception will occur

Use global variable for driver instance

private static Webdriver driver;( Instatiate this on top of every classes)