My code is not hitting the server url

change this in config.xml

1. <widget id="com.illuminatus.qna" version="0.0.2" xmlns="http://www.w3.org/ns/widgets" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:cdv="http://cordova.apache.org/ns/1.0">
   

2. <preference name="android-minSdkVersion" value="19" />         <preference name="android-targetSdkVersion" value="28" /> 
   

3.    <edit-config file="AndroidManifest.xml" mode="merge" target="/manifest/application">
        <application android:usesCleartextTraffic="true" />
        <application android:allowBackup="false" />
        <application android:fullBackupOnly="false" />
    </edit-config>  
   

then remove platform and re add platform
i) ionic cordova platform remove android
ii) ionic cordova platform add android

test it this should work