Please any one help me when i am running with cucumber i can see tis error

Issues/Bugs
1

java.lang.NullPointerException
at io.appium.java_client.pagefactory.AppiumFieldDecorator.getTypeForProxy(AppiumFieldDecorator.java:233)
at io.appium.java_client.pagefactory.AppiumFieldDecorator.proxyForAnElement(AppiumFieldDecorator.java:248)
at io.appium.java_client.pagefactory.AppiumFieldDecorator.access$0(AppiumFieldDecorator.java:246)
at io.appium.java_client.pagefactory.AppiumFieldDecorator$3.proxyForLocator(AppiumFieldDecorator.java:121)
at org.openqa.selenium.support.pagefactory.DefaultFieldDecorator.decorate(DefaultFieldDecorator.java:62)
at io.appium.java_client.pagefactory.AppiumFieldDecorator.decorate(AppiumFieldDecorator.java:172)
at org.openqa.selenium.support.PageFactory.proxyFields(PageFactory.java:113)
at org.openqa.selenium.support.PageFactory.initElements(PageFactory.java:105)
at com.automation.pages.Page.(Page.java:21)
at com.automation.pages.loginPage.(loginPage.java:19)
at com.automation.steps.loginSteps.enterUserName(loginSteps.java:22)
at ✽.Given the user enters in with username(login.feature:4)

2

I am using page factory using cucumber