ERR_CONNECTION_REFUSED Ionic 3

Hello there,

I have this problem quite a while, i traid so many things to fix this like:

  1. Downgrading cordova-plugin-ionic-webview (LINK :net::ERR_CONNECTION_REFUSED (http://localhost:8080/) <–> Android Problem: net::ERR_CONNECTION_REFUSED (http://localhost:8080/) <–> https://ionic.zone/debug/ionic-and-android-4

  2. Change config.xml (LINK: Problem: net::ERR_CONNECTION_REFUSED on debug apk)

the app only work with the comand ionic cordova run android -l if i try to --released or just run the app shows the erro!

Comand List :
ionic cordova run android -l (WORK)
ionic cordova run android (Don’t Work)
ionic cordova run android --released (Don’t Work)
ionic cordova run android --released --prod (Don’t Work)
ionic cordova run android --prod (Don’t Work)

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Ionic Info:

Ionic:

   Ionic CLI          : 5.2.8 (C:\Users\tm_ma\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.1.11

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : android 8.0.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.0.5, cordova-plugin-ionic-webview 4.1.1, (and 21 other plugins)

Utility:

   cordova-res : 0.6.0
   native-run  : 0.2.8

System:

   Android SDK Tools : 26.1.1 (C:\Users\tm_ma\AppData\Local\Android\Sdk)
   NodeJS            : v10.13.0 (C:\Program Files\nodejs\node.exe)
   npm               : 6.4.1
   OS                : Windows 10

Config.xml

<name>Kiddo</name>
    <description>An awesome Ionic/Cordova app.</description>
    <author email="hi@ionicframework" href="http://ionicframework.com/">DS</author>
    <content src="http://localhost:8100" />
    <access origin="*" />
    <allow-intent href="http://*/*" />
    <allow-intent href="https://*/*" />
    <allow-intent href="tel:*" />
    <allow-intent href="sms:*" />
    <allow-intent href="mailto:*" />
    <allow-intent href="geo:*" />
    <edit-config file="AndroidManifest.xml" mode="merge" target="/manifest/application" xmlns:android="http://schemas.android.com/apk/res/android">
        <application android:usesCleartextTraffic="true" />
    </edit-config>
    <resource-file src="resources/android/xml/network_security_config.xml" target="res/xml/network_security_config.xml" />
    <allow-navigation href="*" />
    <preference name="SplashMaintainAspectRatio" value="true" />
    <preference name="FadeSplashScreenDuration" value="300" />
    <preference name="SplashShowOnlyFirstTime" value="false" />
    <preference name="SplashScreen" value="screen" />
    <preference name="SplashScreenDelay" value="3000" />
    <preference name="KeyboardDisplayRequiresUserAction" value="false" />
    <preference name="AutoHideSplashScreen" value="false" />
    <preference name="loadUrlTimeoutValue" value="700000" />
    <platform name="android">
        <allow-intent href="market:*" />
        <icon density="ldpi" src="resources/android/icon/drawable-ldpi-icon.png" />
        <icon density="mdpi" src="resources/android/icon/drawable-mdpi-icon.png" />
        <icon density="hdpi" src="resources/android/icon/drawable-hdpi-icon.png" />
        <icon density="xhdpi" src="resources/android/icon/drawable-xhdpi-icon.png" />
        <icon density="xxhdpi" src="resources/android/icon/drawable-xxhdpi-icon.png" />
        <icon density="xxxhdpi" src="resources/android/icon/drawable-xxxhdpi-icon.png" />
        <splash density="land-ldpi" src="resources/android/splash/drawable-land-ldpi-screen.png" />
        <splash density="land-mdpi" src="resources/android/splash/drawable-land-mdpi-screen.png" />
        <splash density="land-hdpi" src="resources/android/splash/drawable-land-hdpi-screen.png" />
        <splash density="land-xhdpi" src="resources/android/splash/drawable-land-xhdpi-screen.png" />
        <splash density="land-xxhdpi" src="resources/android/splash/drawable-land-xxhdpi-screen.png" />
        <splash density="land-xxxhdpi" src="resources/android/splash/drawable-land-xxxhdpi-screen.png" />
        <splash density="port-ldpi" src="resources/android/splash/drawable-port-ldpi-screen.png" />
        <splash density="port-mdpi" src="resources/android/splash/drawable-port-mdpi-screen.png" />
        <splash density="port-hdpi" src="resources/android/splash/drawable-port-hdpi-screen.png" />
        <splash density="port-xhdpi" src="resources/android/splash/drawable-port-xhdpi-screen.png" />
        <splash density="port-xxhdpi" src="resources/android/splash/drawable-port-xxhdpi-screen.png" />
        <splash density="port-xxxhdpi" src="resources/android/splash/drawable-port-xxxhdpi-screen.png" />
    </platform>
    <platform name="ios">
        <allow-intent href="itms:*" />
        <allow-intent href="itms-apps:*" />
        <icon height="57" src="resources/ios/icon/icon.png" width="57" />
        <icon height="114" src="resources/ios/icon/icon@2x.png" width="114" />
        <icon height="40" src="resources/ios/icon/icon-40.png" width="40" />
        <icon height="80" src="resources/ios/icon/icon-40@2x.png" width="80" />
        <icon height="120" src="resources/ios/icon/icon-40@3x.png" width="120" />
        <icon height="50" src="resources/ios/icon/icon-50.png" width="50" />
        <icon height="100" src="resources/ios/icon/icon-50@2x.png" width="100" />
        <icon height="60" src="resources/ios/icon/icon-60.png" width="60" />
        <icon height="120" src="resources/ios/icon/icon-60@2x.png" width="120" />
        <icon height="180" src="resources/ios/icon/icon-60@3x.png" width="180" />
        <icon height="72" src="resources/ios/icon/icon-72.png" width="72" />
        <icon height="144" src="resources/ios/icon/icon-72@2x.png" width="144" />
        <icon height="76" src="resources/ios/icon/icon-76.png" width="76" />
        <icon height="152" src="resources/ios/icon/icon-76@2x.png" width="152" />
        <icon height="167" src="resources/ios/icon/icon-83.5@2x.png" width="167" />
        <icon height="29" src="resources/ios/icon/icon-small.png" width="29" />
        <icon height="58" src="resources/ios/icon/icon-small@2x.png" width="58" />
        <icon height="87" src="resources/ios/icon/icon-small@3x.png" width="87" />
        <icon height="1024" src="resources/ios/icon/icon-1024.png" width="1024" />
        <splash height="1136" src="resources/ios/splash/Default-568h@2x~iphone.png" width="640" />
        <splash height="1334" src="resources/ios/splash/Default-667h.png" width="750" />
        <splash height="2208" src="resources/ios/splash/Default-736h.png" width="1242" />
        <splash height="1242" src="resources/ios/splash/Default-Landscape-736h.png" width="2208" />
        <splash height="1536" src="resources/ios/splash/Default-Landscape@2x~ipad.png" width="2048" />
        <splash height="2048" src="resources/ios/splash/Default-Landscape@~ipadpro.png" width="2732" />
        <splash height="768" src="resources/ios/splash/Default-Landscape~ipad.png" width="1024" />
        <splash height="2048" src="resources/ios/splash/Default-Portrait@2x~ipad.png" width="1536" />
        <splash height="2732" src="resources/ios/splash/Default-Portrait@~ipadpro.png" width="2048" />
        <splash height="1024" src="resources/ios/splash/Default-Portrait~ipad.png" width="768" />
        <splash height="960" src="resources/ios/splash/Default@2x~iphone.png" width="640" />
        <splash height="480" src="resources/ios/splash/Default~iphone.png" width="320" />
        <splash height="2732" src="resources/ios/splash/Default@2x~universal~anyany.png" width="2732" />
    </platform>
    <plugin name="cordova-plugin-whitelist" spec="~1.3.3" />
    <plugin name="cordova-plugin-device" spec="~2.0.2" />
    <plugin name="cordova-plugin-splashscreen" spec="~5.0.2" />
    <plugin name="cordova-plugin-nativestorage" spec="~2.3.2" />
    <plugin name="cordova-plugin-file" spec="^6.0.1" />
    <plugin name="phonegap-plugin-barcodescanner" spec="~8.0.0">
        <variable name="ANDROID_SUPPORT_V4_VERSION" value="27.+" />
    </plugin>
    <plugin name="cordova-plugin-android-permissions" spec="~1.0.0" />
    <plugin name="cordova-plugin-datepicker" spec="~0.9.3" />
    <plugin name="cordova-plugin-file-transfer" spec="~1.7.1" />
    <plugin name="cordova-plugin-camera" spec="~4.0.3" />
    <plugin name="cordova-plugin-photo-library" spec="~2.2.1" />
    <plugin name="cordova-android-support-gradle-release" spec="^3.0.1" />
    <plugin name="cordova-plugin-firebasex" spec="~6.1.0">
        <variable name="FIREBASE_ANALYTICS_COLLECTION_ENABLED" value="true" />
        <variable name="FIREBASE_PERFORMANCE_COLLECTION_ENABLED" value="true" />
        <variable name="FIREBASE_CRASHLYTICS_COLLECTION_ENABLED" value="true" />
        <variable name="ANDROID_ICON_ACCENT" value="#FF00FFFF" />
        <variable name="ANDROID_PLAY_SERVICES_TAGMANAGER_VERSION" value="17.0.0" />
        <variable name="ANDROID_FIREBASE_CORE_VERSION" value="17.0.0" />
        <variable name="ANDROID_FIREBASE_MESSAGING_VERSION" value="19.0.0" />
        <variable name="ANDROID_FIREBASE_CONFIG_VERSION" value="18.0.0" />
        <variable name="ANDROID_FIREBASE_PERF_VERSION" value="18.0.0" />
        <variable name="ANDROID_FIREBASE_AUTH_VERSION" value="18.0.0" />
        <variable name="ANDROID_CRASHLYTICS_VERSION" value="2.10.1" />
        <variable name="ANDROID_CRASHLYTICS_NDK_VERSION" value="2.1.0" />
        <variable name="ANDROID_SHORTCUTBADGER_VERSION" value="1.1.22" />
    </plugin>
    <plugin name="cordova-plugin-add-swift-support" spec="~2.0.2" />
    <plugin name="cordova-plugin-screen-orientation" spec="~3.0.2" />
    <plugin name="cordova-wheel-selector-plugin" spec="~1.0.0" />
    <plugin name="cordova-plugin-telerik-imagepicker" spec="~2.3.3">
        <variable name="PHOTO_LIBRARY_USAGE_DESCRIPTION" value="Selecione a sua foto para enviar" />
    </plugin>
    <plugin name="cordova-plugin-advanced-http" spec="~2.1.1" />
    <plugin name="cordova-plugin-secure-storage" spec="~3.0.2" />
    <plugin name="cordova-plugin-ionic-keyboard" spec="~2.0.5" />

Plugin List :

cordova-android-support-gradle-release 3.0.1 "cordova-android-support-gradle-release"
cordova-plugin-add-swift-support 2.0.2 "AddSwiftSupport"
cordova-plugin-advanced-http 2.1.1 "Advanced HTTP plugin"
cordova-plugin-android-permissions 1.0.0 "Permissions"
cordova-plugin-androidx 1.0.2 "cordova-plugin-androidx"
cordova-plugin-androidx-adapter 1.1.0 "cordova-plugin-androidx-adapter"
cordova-plugin-camera 4.0.3 "Camera"
cordova-plugin-datepicker 0.9.3 "DatePicker"
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-file 6.0.1 "File"
cordova-plugin-file-transfer 1.7.1 "File Transfer"
cordova-plugin-firebasex 6.1.0 "Google Firebase Plugin"
cordova-plugin-ionic-keyboard 2.0.5 "cordova-plugin-ionic-keyboard"
cordova-plugin-ionic-webview 4.1.1 "cordova-plugin-ionic-webview"
cordova-plugin-nativestorage 2.3.2 "NativeStorage"
cordova-plugin-photo-library 2.2.1 "Photo Library"
cordova-plugin-screen-orientation 3.0.2 "Screen Orientation"
cordova-plugin-secure-storage 3.0.2 "SecureStorage"
cordova-plugin-splashscreen 5.0.2 "Splashscreen"
cordova-plugin-telerik-imagepicker 2.3.3 "ImagePicker"
cordova-plugin-whitelist 1.3.3 "Whitelist"
cordova-wheel-selector-plugin 1.0.0 "Cordova Wheel Selector Plugin"
es6-promise-plugin 4.2.2 "Promise"
phonegap-plugin-barcodescanner 8.0.0 "BarcodeScanner"```

Remove your folder node_modules and reinstall using the npm install

Try it!

Thanks for the awnser, but doesnt work, the erro still appears.