get error charset when call page.asXml() or page.asNormalizedText() at HtmlUnit 2.58.0 #452

import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

import java.io.IOException;
import java.net.MalformedURLException;

public class HTest {
    public static void main(String[] args) {
        final BrowserVersion browser =
                new BrowserVersion.BrowserVersionBuilder(BrowserVersion.FIREFOX)
                        // uncomment this or change "deflate" to "br" to get right charset of UTF-8 which declared in html source code at line 36: <meta charset="utf-8" />
                        //.setAcceptEncodingHeader("deflate")
                        .build();
        try (final WebClient webClient = new WebClient(browser)) {
            webClient.getOptions().setThrowExceptionOnScriptError(false);
            try {
                 String url="http://www.jj.gov.cn/art/2021/8/19/art_1229539289_59057787.html";

                final HtmlPage page = webClient.getPage(url);
                final String pageAsXml = page.asXml();
                System.out.println(pageAsXml);

                final String pageAsText = page.asNormalizedText();
                System.out.println(pageAsText);
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}