Multiple Cucumber features in one file - spring-boot

Question

I've created a cucumber feature file as follows
Feature: Managing Students
Scenario: Manage Students page
Given Open browser and launch application
And Home page is displayed
When User clicks on Manage Students link
Then User sees Manage Students page
Scenario: Create Students Page
Given Click on Add student button
And New form is displayed
Then Enter details in the form
Then Click submit
And a Java file as follows
#SneakyThrows
#When("^User clicks on Manage Students link$")
public void clickOnManagerStudentsLink(){
String manageStudentsBtnText = webDriver.findElement(By.id("manage-students-btn")).getText();
Assert.assertTrue(manageStudentsBtnText.equalsIgnoreCase("Manage Students"));
webDriver.findElement(By.id("manage-students-btn")).click();
}
#SneakyThrows
#Then("^User sees Manage Students page$")
public void userSeesManageStudentsPage(){
String manageStudentsBtnText = webDriver.findElement(By.id("add-student-btn")).getText();
Assert.assertTrue(manageStudentsBtnText.equalsIgnoreCase("Add Student"));
}
#SneakyThrows
#Given("^Click on Add student button$")
public void clickOnAddStudentButton(){
webDriver.findElement(By.id("add-student-btn")).click();
Assert.assertTrue(webDriver.findElement(By.xpath("//h2[contains(text(),'Add Student')]")).getText().equalsIgnoreCase("Add Student"));
}
Now, when I run a test file, the first scenario executes perfectly, but when it comes to first line of clickOnAddStudentButton() it throws NullPointerException. TIA.