Ionicons upgrade from v4 to v5 resulting in not displaying any icons - ionic-framework

Question

I did initially add this code to my index.html:
<script src="https://unpkg.com/ionicons#5.0.0/dist/ionicons.js"></script>
To use the latest version of the ionicons but now when I remove that line from index.html, none of my ionicons are no longer appearing. I am running ionic cordova run android to test it on a physical device.
ionic info
Ionic:
Ionic CLI: 5.4.16 (C:\Users\user\AppData\Roaming\npm\node_modules\ionic) Ionic Framework : #ionic/angular 4.11.7 #angular-devkit/build-angular : 0.900.2 #angular-devkit/schematics : 9.0.2 #angular/cli : 9.0.2 #ionic/angular-toolkit : 2.0.0
Capacitor:
Capacitor CLI: 1.2.1 #capacitor/core : 1.2.1
Cordova:
Cordova CLI: 9.0.0 (cordova-lib#9.0.1) Cordova Platforms : android 8.1.0 Cordova Plugins : cordova-plugin-ionic-keyboard
2.2.0, cordova-plugin-ionic-webview 4.1.1, (and 12 other plugins)
Utility:
cordova-res: 0.4.0 native-run: 0.2.6
angular.json
{
"$schema": "./node_modules/#angular/cli/lib/config/schema.json",
"version": 1,
"defaultProject": "app",
"newProjectRoot": "projects",
"projects": {
"app": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": {},
"architect": {
"build": {
"builder": "#angular-devkit/build-angular:browser",
"options": {
"outputPath": "www",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"assets": [
{
"glob": "**/*",
"input": "src/assets",
"output": "assets"
},
{
"glob": "**/*.svg",
"input": "node_modules/#ionic/angular/dist/ionic/svg",
"output": "./svg"
}
],
"styles": [
{
"input": "src/theme/variables.scss"
},
{
"input": "src/global.scss"
}
],
"scripts": []
},
"configurations": {
"production": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"extractCss": true,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"budgets": [
{
"type": "initial",
"maximumWarning": "2mb",
"maximumError": "5mb"
}
]
},
"ci": {
"progress": false
}
}
},
"serve": {
"builder": "#angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "app:build"
},
"configurations": {
"production": {
"browserTarget": "app:build:production"
},
"ci": {
"progress": false
}
}
},
"extract-i18n": {
"builder": "#angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "app:build"
}
},
"test": {
"builder": "#angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.json",
"karmaConfig": "karma.conf.js",
"styles": [],
"scripts": [],
"assets": [
{
"glob": "favicon.ico",
"input": "src/",
"output": "/"
},
{
"glob": "**/*",
"input": "src/assets",
"output": "/assets"
}
]
},
"configurations": {
"ci": {
"progress": false,
"watch": false
}
}
},
"lint": {
"builder": "#angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"tsconfig.app.json",
"tsconfig.spec.json",
"e2e/tsconfig.json"
],
"exclude": [
"**/node_modules/**"
]
}
},
"e2e": {
"builder": "#angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "app:serve"
},
"configurations": {
"production": {
"devServerTarget": "app:serve:production"
},
"ci": {
"devServerTarget": "app:serve:ci"
}
}
},
"ionic-cordova-build": {
"builder": "#ionic/angular-toolkit:cordova-build",
"options": {
"browserTarget": "app:build"
},
"configurations": {
"production": {
"browserTarget": "app:build:production"
}
}
},
"ionic-cordova-serve": {
"builder": "#ionic/angular-toolkit:cordova-serve",
"options": {
"cordovaBuildTarget": "app:ionic-cordova-build",
"devServerTarget": "app:serve"
},
"configurations": {
"production": {
"cordovaBuildTarget": "app:ionic-cordova-build:production",
"devServerTarget": "app:serve:production"
}
}
}
}
}
},
"cli": {
"defaultCollection": "#ionic/angular-toolkit",
"analytics": false
},
"schematics": {
"#ionic/angular-toolkit:component": {
"styleext": "scss"
},
"#ionic/angular-toolkit:page": {
"styleext": "scss"
}
}
}
package.json
{
"name": "project",
"version": "0.0.1",
"author": "Ionic Framework",
"homepage": "https://ionicframework.com/",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"#angular/common": "~9.0.1",
"#angular/compiler": "~9.0.1",
"#angular/core": "~9.0.1",
"#angular/forms": "~9.0.1",
"#angular/platform-browser": "~9.0.1",
"#angular/platform-browser-dynamic": "~9.0.1",
"#angular/router": "~9.0.1",
"#capacitor/android": "^1.4.0",
"#capacitor/core": "1.2.1",
"#ionic-native/android-permissions": "^5.19.1",
"#ionic-native/barcode-scanner": "^5.19.1",
"#ionic-native/camera": "^5.19.1",
"#ionic-native/core": "^5.19.1",
"#ionic-native/file": "^5.19.1",
"#ionic-native/file-opener": "^5.19.1",
"#ionic-native/file-transfer": "^5.19.1",
"#ionic-native/http": "^5.19.1",
"#ionic-native/in-app-browser": "^5.19.1",
"#ionic-native/ionic-webview": "^5.19.1",
"#ionic-native/qr-scanner": "^5.19.1",
"#ionic-native/splash-screen": "^5.19.1",
"#ionic-native/status-bar": "^5.19.1",
"#ionic/angular": "^4.11.7",
"#ionic/cli": "^6.1.0",
"#ionic/storage": "^2.2.0",
"#swimlane/ngx-datatable": "^16.0.3",
"cordova-android": "^8.1.0",
"cordova-plugin-advanced-http": "^2.3.1",
"cordova-plugin-android-permissions": "^1.0.2",
"cordova-plugin-camera": "^4.1.0",
"cordova-plugin-file": "^6.0.2",
"cordova-plugin-file-opener2": "^2.2.1",
"cordova-plugin-file-transfer": "^1.7.1",
"cordova-plugin-inappbrowser": "^3.1.0",
"cordova-sqlite-storage": "^3.4.1",
"core-js": "^2.6.11",
"file-saver": "^2.0.2",
"ionicons": "^5.0.0",
"ngx-qrcode2": "0.0.9",
"phonegap-plugin-barcodescanner": "^8.1.0",
"rxjs": "^6.5.4",
"tslib": "^1.9.0",
"zone.js": "~0.10.2"
},
"devDependencies": {
"#angular-devkit/architect": "~0.801.2",
"#angular-devkit/build-angular": "^0.900.2",
"#angular-devkit/core": "~9.0.2",
"#angular-devkit/schematics": "~9.0.2",
"#angular/cli": "~9.0.2",
"#angular/compiler-cli": "~9.0.1",
"#angular/language-service": "~9.0.1",
"#capacitor/cli": "1.2.1",
"#ionic/angular-toolkit": "~2.0.0",
"#types/jasmine": "~3.3.8",
"#types/jasminewd2": "^2.0.8",
"#types/node": "~8.9.4",
"codelyzer": "^5.2.1",
"cordova-plugin-device": "^2.0.3",
"cordova-plugin-ionic-keyboard": "^2.2.0",
"cordova-plugin-ionic-webview": "^4.1.3",
"cordova-plugin-splashscreen": "^5.0.3",
"cordova-plugin-statusbar": "^2.4.3",
"cordova-plugin-whitelist": "^1.3.4",
"jasmine-core": "~3.4.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.1.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.1",
"karma-jasmine": "~2.0.1",
"karma-jasmine-html-reporter": "^1.5.1",
"protractor": "~5.4.0",
"ts-node": "~7.0.0",
"tslint": "~5.15.0",
"typescript": "~3.7.5"
},
"description": "An Ionic project",
"cordova": {
"plugins": {
"cordova-plugin-whitelist": {},
"cordova-plugin-statusbar": {},
"cordova-plugin-device": {},
"cordova-plugin-splashscreen": {},
"cordova-plugin-ionic-webview": {
"ANDROID_SUPPORT_ANNOTATIONS_VERSION": "27.+"
},
"cordova-plugin-ionic-keyboard": {},
"phonegap-plugin-barcodescanner": {
"ANDROID_SUPPORT_V4_VERSION": "27.+"
},
"cordova-sqlite-storage": {},
"cordova-plugin-advanced-http": {
"OKHTTP_VERSION": "3.10.0"
},
"cordova-plugin-file-transfer": {},
"cordova-plugin-android-permissions": {},
"cordova-plugin-inappbrowser": {},
"cordova-plugin-file-opener2": {},
"cordova-plugin-camera": {
"ANDROID_SUPPORT_V4_VERSION": "27.+"
}
},
"platforms": [
"android"
]
}
}

Answer 1

METHOD 1
Try to run:
cordova clean
and retry. If not work follow method two
METHOD 2
try to run:
ionic cordova platform rm android
remove your node_modules folder and run
npm install
and
ionic cordova platform add android