java - How to click a href link using Selenium -

i have html href link

<a href="/docs/configuration">app configuration</a> 

using selenium need click link. currently, using below code -

driver.findelement(by.xpath("//a[text()='app configuration']")).click();  

but it's not redirecting page. tried below code -

 driver.findelement(by.xpath(//a[@href ='/docs/configuration']")).click(); 

but throwing below exception -

org.openqa.selenium.elementnotvisibleexception: element not visible , may not interacted command duration or timeout: 13 milliseconds

the link visible , page loaded. don't know what's wrong code.

 webdriver.findelement(by.xpath("//a[@href='/docs/configuration']")).click(); 

the above line works fine. please remove space after href.

is element visible in page, if element not visible please scroll down page perform click action.