fix

src/app/about/about-routing.module.ts

@@ -0,0 +1,17 @@
+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+
+import { AboutPage } from './about.page';
+
+const routes: Routes = [
+  {
+    path: '',
+    component: AboutPage
+  }
+];
+
+@NgModule({
+  imports: [RouterModule.forChild(routes)],
+  exports: [RouterModule],
+})
+export class AboutPageRoutingModule {}

src/app/about/about.module.ts

@@ -0,0 +1,20 @@
+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { FormsModule } from '@angular/forms';
+
+import { IonicModule } from '@ionic/angular';
+
+import { AboutPageRoutingModule } from './about-routing.module';
+
+import { AboutPage } from './about.page';
+
+@NgModule({
+  imports: [
+    CommonModule,
+    FormsModule,
+    IonicModule,
+    AboutPageRoutingModule
+  ],
+  declarations: [AboutPage]
+})
+export class AboutPageModule {}

src/app/about/about.page.html

@@ -0,0 +1,9 @@
+<ion-header>
+  <ion-toolbar>
+    <ion-title>about</ion-title>
+  </ion-toolbar>
+</ion-header>
+
+<ion-content>
+
+</ion-content>

src/app/about/about.page.spec.ts

@@ -0,0 +1,24 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { IonicModule } from '@ionic/angular';
+
+import { AboutPage } from './about.page';
+
+describe('AboutPage', () => {
+  let component: AboutPage;
+  let fixture: ComponentFixture<AboutPage>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ AboutPage ],
+      imports: [IonicModule.forRoot()]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(AboutPage);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  }));
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/about/about.page.ts

@@ -0,0 +1,15 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-about',
+  templateUrl: './about.page.html',
+  styleUrls: ['./about.page.scss'],
+})
+export class AboutPage implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}