Error: Failed to transpile TypeScript Error: Failed to transpile TypeScript - node.js

Question

I have an application that uses ionic and angular. For deploying the same application as a mobile app, I tried ionic cordova build android, which gave me an error. bash: ionic: command not found
So, without realizing what disaster it could cause I installed it using the command.
npm install -g #ionic/cli.
Then I again run the command ionic cordova build android.
But due to the version of node being 8.12.0 installed in my machine, it gave me an error and I couldn't run that command.
and I reinstall the node, and tried again.
And now coming back to the application, I tried to build that to production, since then it is always giving me an error saying
Cannot find type definition file for '#types'.
I removed the ionic CLI, uninstall node js, and uninstall npm. Uninstall everything related to node. But the problem has not been gone yet.
I also deleted node_modules and package-lock json and npm cache clean --force, npm install.
But it did not work.
As the error says Cannot find type definition file for '#types', I also added the types in tsconfig.json,
"types": [],
into
"compilerOptions"
Though the error goes away while npm run build --prod --verbose, but the application doesn't run further, it gave a lot of error in the console and the application just stopped.
package.json
{
"name": "ClientApp",
"version": "0.0.1",
"author": "Ionic Framework",
"homepage": "http://ionicframework.com/",
"private": true,
"scripts": {
"clean": "ionic-app-scripts clean",
"build": "ionic-app-scripts build",
"lint": "ionic-app-scripts lint",
"ionic:build": "node --max-old-space-size=8192 ./node_modules/#ionic/app-scripts/bin/ionic-app-scripts.js build",
"ionic:serve": "ionic-app-scripts serve"
},
"dependencies": {
"#angular/animations": "5.2.9",
"#angular/common": "5.2.9",
"#angular/compiler": "5.2.9",
"#angular/compiler-cli": "5.2.9",
"#angular/core": "5.2.9",
"#angular/forms": "5.2.9",
"#angular/http": "5.2.9",
"#angular/platform-browser": "5.2.9",
"#angular/platform-browser-dynamic": "5.2.9",
"#ionic-native/core": "4.6.0",
"#ionic-native/splash-screen": "4.6.0",
"#ionic-native/status-bar": "4.6.0",
"#ionic/pro": "1.0.20",
"#ionic/storage": "2.1.3",
"alertify.js": "^1.0.12",
"angular-tree-component": "^7.1.0",
"angular2-cookie": "^1.2.6",
"angular2-indexeddb": "^1.2.2",
"blueimp-canvas-to-blob": "^3.20.0",
"bootstrap": "^4.1.0",
"chart.js": "^2.9.3",
"cordova-android": "7.0.0",
"cordova-plugin-device": "^2.0.2",
"cordova-plugin-ionic-keyboard": "^2.0.5",
"cordova-plugin-ionic-webview": "^1.2.1",
"cordova-plugin-splashscreen": "^5.0.2",
"cordova-plugin-whitelist": "^1.3.3",
"dragula": "^3.7.2",
"idlejs": "^2.1.0",
"ionic-angular": "3.9.2",
"ionic3-star-rating": "^2.1.2",
"ionicons": "3.0.0",
"jquery": "^3.3.1",
"microsoft-applicationinsights-angular5": "^0.1.6",
"ng2-ckeditor": "^1.2.0",
"ng2-dragula": "^2.1.1",
"ng2-google-charts": "^6.0.0",
"ng2-img-max": "^2.2.4",
"ng2-order-pipe": "^0.1.5",
"ng2-pagination": "^2.0.2",
"ng4-validators": "^6.0.0",
"ngx-autosize": "^1.8.0",
"ngx-color-picker": "^7.0.2",
"ngx-order-pipe": "^2.0.4",
"ngx-pinch-zoom": "^2.4.4",
"ngx-skeleton-loader": "^1.2.7",
"node-sass": "^4.14.1",
"popper.js": "^1.14.3",
"rxjs": "5.5.8",
"sw-toolbox": "3.6.0",
"xlsx": "^0.17.0",
"zone.js": "0.8.20"
},
"devDependencies": {
"#ionic/app-scripts": "^3.2.4",
"typescript": "~2.6.2"
},
"description": "An Ionic project",
"cordova": {
"plugins": {
"cordova-plugin-whitelist": {},
"cordova-plugin-device": {},
"cordova-plugin-splashscreen": {},
"cordova-plugin-ionic-webview": {},
"cordova-plugin-ionic-keyboard": {}
},
"platforms": [
"android"
]
},
"config": {
"ionic_www_dir": "../",
"ionic_build_dir": "../build"
}
}
what should I do to build this application, which was built before but now had stopped?