Android Question Get element

[sourse001]

hi guys
i use webviewextras1.30 in b4a
and i use this code :

        Dim Javascript As String
        Javascript=$"B4A.CallSub('getcount', false, document.getElementsByClassName("r8ZrO")[0].firstElementChild.textContent)"$
        WebViewExtras1.executeJavascript(webview1, Javascript)

This code works within sdk 10, but within sdk 26 dont work!

B4A.CallSub('getcount'

is dont works.