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JavaScript Error Element is null: while interacting ShadownDom element

I am writing code in Javascript to automate the website https://www.fashionette.co.uk/. I have to use cookies when the user lands on the page for the first time

I am writing the following code to get cookies:

JavascriptExecutor js = (JavascriptExecutor)webdriver;
WebElement element= (WebElement) js.executeScript("return document.getElementById('usercentrics-root').shadowRoot.querySelector("[data-testid='uc-accept-all-button']");");
            element.click()

it locate element in browser correctly:

enter image description here

But In Intellij it gives me error:

java.lang.NullPointerException: Cannot invoke "org.openqa.selenium.WebElement.click()" because "element" is null

enter image description here

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Answer

If you are using Java create a browser instance and find elements:

System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");           
WebDriver driver = new ChromeDriver(); 
driver.get("http://www.google.com/");   
WebElement WE = driver.findElementByCss("YourCSSSelector"); 
WE.click();

If you are using JavaScript change your into:

WebElement element = (WebElement) js.executeScript
("document.getElementById('usercentrics-root').
shadowRoot.querySelector("[data-testid='uc-accept-all-button'])");
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