When Chrome is disabled on Android O, activity including webview drops

This is a situation where activity including webview drops when Chrome is disabled.
I'm in trouble because there's no way to improve it.

The application will be terminated in step 2 above.
This is not happening on Android 6.0/7.0 and is happening on Android O (API level 26/8.0.0)
Anything else unknown

The affected codes are as follows

public class TestWebActivity extensions Activity {
    @ Override
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_testweb);
        WebView webView= (WebView) findViewById (R.id.webView);
        webView.setWebViewClient(newMyWebViewClient());
    }

    class MyWebViewClient extensions WebViewClient {
        @ Override
        public boolean shouldOverrideUrlLoading (WebView view, String url) {
            return true;
        }
    }
}

The error log is as follows:

12-28 16:41:42.146 31047-31047/xxxxxxxE/AndroidRuntime:FATAL EXCEPTION:main
Process: xxxxxxxxx, PID:31047
java.lang.RuntimeException:Unable to start activity ComponentInfo {xxxxxxx/xxxxxxxxx.TestWebActivity}:android.view.InflateException:Binary XML file line#33:Binary XML file line#33:Error inflating class android.webkit. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11 (Unknown Source:0)

Error inflating class android.webkit.WebView has a bug on Android 5, but I couldn't find any events on Android O.

I would appreciate it if you could let me know if anyone knows anything.