Android espresso click the WebView button

Hello, I need to click the web view in the test. The button in the WebView code has the following code:

<input type="submit" onclick="ignoreClose()" name="UsernamePasswordEntry" value="Submit">

I try this:

   onWebView().withElement(findElement(Locator.NAME, "UsernamePasswordEntry")).perform(webClick());

But I got:

java.lang.RuntimeException: java.lang.RuntimeException: Atom evaluation returned null!

Is there any way to deal with it?

resolvent:

Try using locator.xpath, for example

onWebView().withElement(findElement(Locator.XPATH, "here put XPATH")).perform(webClick())

To get the XPath, simply check the element on the web, right-click the marked element, and copy the XPath