Unhandled Promise Rejection in Angular 2 - angularjs

Question

Few minutes ago, i just run into a 404 error in my angular 2 app. There are no errors in my terminal although there are some 404 errors in my console. I have included bootstrap in my node_modules in the angular-cli.json file. However, i dont't know where the unhandled promise rejection is coming from. Any idea on how to resolve this issue?
**404 error**
Unhandled Promise rejection: Failed to load ../bootstrap/css/bootstrap.min.css ; Zone: <root> ; Task: Promise.then ; Value: Failed to load ../bootstrap/css/bootstrap.min.css undefined
ZoneAwareError {__zone_symbol__error: Error: Uncaught (in promise): Failed to load ../bootstrap/css/bootstrap.min.css
at resolvePromis…, rejection: "Failed to load ../bootstrap/css/bootstrap.min.css", promise: ZoneAwarePromise, zone: Zone, task: ZoneTask}
GET http://localhost:4200/css/local.css 404 (Not Found)
**angular-cli**
{
"project": {
"version": "1.0.0-beta.28.3",
"name": "frontend"
},
"apps": [
{
"root": "src",
"outDir": "dist",
"assets": [
"assets",
"favicon.ico"
],
"index": "index.html",
"main": "main.ts",
"polyfills": "polyfills.ts",
"test": "test.ts",
"tsconfig": "tsconfig.json",
"prefix": "app",
"styles": [
"styles.css",
"../node_modules/bootstrap/dist/css/bootstrap.min.css",
"../node_modules/font-awesome/css/font-awesome.min.css",
],
"scripts": [
],
"environments": {
"source": "environments/environment.ts",
"dev": "environments/environment.ts",
"prod": "environments/environment.prod.ts"
}
}
],
"e2e": {
"protractor": {
"config": "./protractor.conf.js"
}
},
"lint": [
{
"files": "src/**/*.ts",
"project": "src/tsconfig.json"
},
{
"files": "e2e/**/*.ts",
"project": "e2e/tsconfig.json"
}
],
"test": {
"karma": {
"config": "./karma.conf.js"
}
},
"defaults": {
"styleExt": "css",
"prefixInterfaces": false,
"inline": {
"style": false,
"template": false
},
"spec": {
"class": false,
"component": true,
"directive": true,
"module": false,
"pipe": true,
"service": true
}
}
}

Answer 1

You made mistake in your app.dashboard.html as below,
Which should be as