title: Ionic problem: [ng]Schema validation failed with the following errors:[ng]Data path".builders['app-shell']"should have required property 'class'
body: <p>affter I update the ionic4 to ionic5 and try to run the ionic app the server is broken and show me this Error :</p>
  
  <blockquote>
    <p>[ng] Schema validation failed with the following errors: [ng] Data
    path ".builders['app-shell']" should have required property 'class'.</p>
    
    <p>[ERROR] ng has unexpectedly closed (exit code 1).</p>
  </blockquote>
  
  <hr>
  
  <p>I am try to change the @angular-devkit/build-angular node package as I have managed to resolve this issue by rolling back my back down from ^0.800.0 to ^0.12.4. 
  by this way: npm uninstall @angular-devkit/build-angular npm install @angular-devkit/build-angular@0.12.4
  by this way :</p>
  
  <pre><code>"@angular-devkit/build-angular": "^0.800.0"
  
  "@angular-devkit/build-angular": "^0.10.0"
  </code></pre>
  
  <p>it solve the problem but give me this error :</p>
  
  <blockquote>
    <p>[ng] Schema validation failed with the following errors: [ng]   Data
    path "" should NOT have additional properties(es5BrowserSupport).</p>
    
    <p>[ERROR] ng has unexpectedly closed (exit code 1).</p>
  </blockquote>
  
  <p>and still not work</p>
  
  <hr>
  
  <p>this is the package json:</p>
  
  <pre><code>`{
    "name": "ionicchattingapp",
    "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": "^7.2.2",
      "@angular/core": "^7.2.2",
      "@angular/forms": "^7.2.2",
      "@angular/http": "^7.2.2",
      "@angular/platform-browser": "^7.2.2",
      "@angular/platform-browser-dynamic": "^7.2.2",
      "@angular/router": "^7.2.2",
      "@ionic-native/core": "^5.0.0",
      "@ionic-native/splash-screen": "^5.0.0",
      "@ionic-native/status-bar": "^5.0.0",
      "@ionic/angular": "^4.1.0",
      "cordova-android": "7.1.4",
      "cordova-plugin-device": "^2.0.2",
      "cordova-plugin-ionic-keyboard": "^2.1.3",
      "cordova-plugin-ionic-webview": "^3.1.2",
      "cordova-plugin-splashscreen": "^5.0.2",
      "cordova-plugin-statusbar": "^2.4.2",
      "cordova-plugin-whitelist": "^1.3.3",
      "core-js": "^2.5.4",
      "rxjs": "~6.3.3",
      "zone.js": "~0.8.29"
    },
    "devDependencies": {
      "@angular-devkit/architect": "~0.12.3",
      "@angular-devkit/build-angular": "0.12.4",
      "@angular-devkit/core": "~7.2.3",
      "@angular-devkit/schematics": "~7.2.3",
      "@angular/cli": "~7.3.1",
      "@angular/compiler": "~7.2.2",
      "@angular/compiler-cli": "~7.2.2",
      "@angular/language-service": "~7.2.2",
      "@ionic/angular-toolkit": "~1.4.0",
      "@types/jasmine": "~2.8.8",
      "@types/jasminewd2": "~2.0.3",
      "@types/node": "~10.12.0",
      "codelyzer": "~4.5.0",
      "jasmine-core": "~2.99.1",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "~3.1.4",
      "karma-chrome-launcher": "~2.2.0",
      "karma-coverage-istanbul-reporter": "~2.0.1",
      "karma-jasmine": "~1.1.2",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.4.0",
      "ts-node": "~8.0.0",
      "tslint": "~5.12.0",
      "typescript": "~3.1.6"
    },
    "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": {}
      },
      "platforms": [
        "android"
      ]
    },
    "main": "index.js",
    "repository": {
      "type": "git",
      "url": "\u0016git remote add origin https://github.com/Omar-Sh1/nodeChatApp.git\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[D\u001b[A\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b[C\u001b\u001b[B"
    },
    "keywords": [
      "chatting"
    ],
    "license": "ISC"
  }
  `
  </code></pre>
  
  <p>and this is the Angular json :</p>
  
  <pre><code>{
    "$schema": "./node_modules/@angular-devkit/core/src/workspace/workspace-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": {
              "progress": false,
              "outputPath": "www",
              "index": "src/index.html",
              "main": "src/main.ts",
              "polyfills": "src/polyfills.ts",
              "tsConfig": "src/tsconfig.app.json",
              "assets": [
                {
                  "glob": "**/*",
                  "input": "src/assets",
                  "output": "assets"
                },
                {
                  "glob": "**/*.svg",
                  "input": "node_modules/ionicons/dist/ionicons/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
              }
            }
          },
          "serve": {
            "builder": "@angular-devkit/build-angular:dev-server",
            "options": {
              "browserTarget": "app:build"
            },
            "configurations": {
              "production": {
                "browserTarget": "app:build:production"
              }
            }
          },
          "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": "src/tsconfig.spec.json",
              "karmaConfig": "src/karma.conf.js",
              "styles": [],
              "scripts": [],
              "assets": [
                {
                  "glob": "favicon.ico",
                  "input": "src/",
                  "output": "/"
                },
                {
                  "glob": "**/*",
                  "input": "src/assets",
                  "output": "/assets"
                }
              ]
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": [
                "src/tsconfig.app.json",
                "src/tsconfig.spec.json"
              ],
              "exclude": [
                "**/node_modules/**"
              ]
            }
          },
          "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"
              }
            }
          }
        }
      },
      "app-e2e": {
        "root": "e2e/",
        "projectType": "application",
        "architect": {
          "e2e": {
            "builder": "@angular-devkit/build-angular:protractor",
            "options": {
              "protractorConfig": "e2e/protractor.conf.js",
              "devServerTarget": "app:serve"
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": "e2e/tsconfig.e2e.json",
              "exclude": [
                "**/node_modules/**"
              ]
            }
          }
        }
      }
    },
    "cli": {
      "defaultCollection": "@ionic/angular-toolkit"
    },
    "schematics": {
      "@ionic/angular-toolkit:component": {
        "styleext": "scss"
      },
      "@ionic/angular-toolkit:page": {
        "styleext": "scss"
      }
    }
  }
  </code></pre>