Webview Doesn't Open Some Sites In Recent Versions Of Android

I have an app that open a webview and I found that I can't open some sites in recent versions of android. Before I got the error Page not found but I was searching and I found this

Solution 1:

I solved it. In my AndroidManifest.xml I had this 2 lines 'together' and I removed android:networkSecurityConfig="@xml/network_security_config":

<application
    ...
    android:networkSecurityConfig="@xml/network_security_config" <!--I removed that one -->
    android:usesCleartextTraffic="true"
>