diff --git a/src/App.tsx b/src/App.tsx
index 263827b..705e40d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -100,39 +100,8 @@ export class App extends React.Component<IAppProps> {
           historyCurrentStep: 0,
           isLoaded: true
         });
-      }, (error) => {
-        // TODO: Implement an alert component
-        console.warn('[NewEditor] Could not fetch resource from API. Returning default.', error);
-        const MainContainer = new ContainerModel(
-          null,
-          {
-            id: 'main',
-            parentId: 'null',
-            x: 0,
-            y: 0,
-            width: DEFAULT_CONFIG.MainContainer.Width,
-            height: DEFAULT_CONFIG.MainContainer.Height,
-            fillOpacity: DEFAULT_CONFIG.MainContainer.Style.fillOpacity,
-            stroke: DEFAULT_CONFIG.MainContainer.Style.stroke,
-          }
-        );
-
-        // Save the configuration and the new MainContainer
-        // and default the selected container to it
-        this.setState({
-          configuration: DEFAULT_CONFIG,
-          history:
-          [
-            {
-              MainContainer,
-              SelectedContainer: MainContainer,
-              TypeCounters: {}
-            }
-          ],
-          historyCurrentStep: 0,
-          isLoaded: true
-        });
-      });
+      }, (error) => { throw new Error(error); }
+      );
   }
 
   public LoadEditor(files: FileList | null): void {
@@ -213,28 +182,3 @@ export async function fetchConfiguration(): Promise<Configuration> {
     xhr.send();
   });
 }
-
-
-const DEFAULT_CONFIG: Configuration = {
-  AvailableContainers: [
-    {
-      Type: 'Container',
-      Width: 75,
-      Height: 100,
-      Style: {
-        fillOpacity: 0,
-        stroke: 'green'
-      }
-    }
-  ],
-  AvailableSymbols: [],
-  MainContainer: {
-    Type: 'Container',
-    Width: 2000,
-    Height: 100,
-    Style: {
-      fillOpacity: 0,
-      stroke: 'black'
-    }
-  }
-}
diff --git a/src/Components/ElementsSidebar/ElementsSidebar.test.tsx b/src/Components/ElementsSidebar/ElementsSidebar.test.tsx
deleted file mode 100644
index d52fe97..0000000
--- a/src/Components/ElementsSidebar/ElementsSidebar.test.tsx
+++ /dev/null
@@ -1,242 +0,0 @@
-import { describe, test, expect, vi } from 'vitest';
-import * as React from 'react';
-import { fireEvent, render, screen } from '../../utils/test-utils';
-import { ElementsSidebar } from './ElementsSidebar';
-import { IContainerModel } from '../../Interfaces/ContainerModel';
-
-describe.concurrent('Elements sidebar', () => {
-  it('No elements', () => {
-    render(<ElementsSidebar
-      MainContainer={null}
-      isOpen={true}
-      isHistoryOpen={false}
-      SelectedContainer={null}
-      onClick={() => {}}
-      onPropertyChange={() => {}}
-      selectContainer={() => {}}
-    />);
-
-    expect(screen.getByText(/Elements/i));
-    expect(screen.queryByText('id')).toBeNull();
-    expect(screen.queryByText(/main/i)).toBeNull();
-  });
-
-  it('With a MainContainer', () => {
-    render(<ElementsSidebar
-      MainContainer={{
-        children: [],
-        parent: null,
-        properties: {
-          id: 'main',
-          parentId: null,
-          x: 0,
-          y: 0,
-          width: 2000,
-          height: 100
-        },
-        userData: {}
-      }}
-      isOpen={true}
-      isHistoryOpen={false}
-      SelectedContainer={null}
-      onClick={() => {}}
-      onPropertyChange={() => {}}
-      selectContainer={() => {}}
-    />);
-
-    expect(screen.getByText(/Elements/i));
-    expect(screen.queryByText('id')).toBeNull();
-    expect(screen.getByText(/main/i));
-  });
-
-  it('With a selected MainContainer', () => {
-    const MainContainer = {
-      children: [],
-      parent: null,
-      properties: {
-        id: 'main',
-        parentId: '',
-        x: 0,
-        y: 0,
-        width: 2000,
-        height: 100
-      },
-      userData: {}
-    };
-
-    const { container } = render(<ElementsSidebar
-      MainContainer={MainContainer}
-      isOpen={true}
-      isHistoryOpen={false}
-      SelectedContainer={MainContainer}
-      onClick={() => {}}
-      onPropertyChange={() => {}}
-      selectContainer={() => {}}
-    />);
-
-    expect(screen.getByText(/Elements/i));
-    expect(screen.getByText(/main/i));
-    expect(screen.queryByText('id')).toBeDefined();
-    expect(screen.queryByText('parentId')).toBeDefined();
-    expect(screen.queryByText('x')).toBeDefined();
-    expect(screen.queryByText('y')).toBeDefined();
-    expect(screen.queryByText('width')).toBeDefined();
-    expect(screen.queryByText('height')).toBeDefined();
-    const propertyId = container.querySelector('#property-id');
-    const propertyParentId = container.querySelector('#property-parentId');
-    const propertyX = container.querySelector('#property-x');
-    const propertyY = container.querySelector('#property-y');
-    const propertyWidth = container.querySelector('#property-width');
-    const propertyHeight = container.querySelector('#property-height');
-    expect((propertyId as HTMLInputElement).value).toBe(MainContainer.properties.id.toString());
-    expect(propertyParentId).toBeDefined();
-    expect((propertyParentId as HTMLInputElement).value).toBe('');
-    expect(propertyX).toBeDefined();
-    expect((propertyX as HTMLInputElement).value).toBe(MainContainer.properties.x.toString());
-    expect(propertyY).toBeDefined();
-    expect((propertyY as HTMLInputElement).value).toBe(MainContainer.properties.y.toString());
-    expect(propertyWidth).toBeDefined();
-    expect((propertyWidth as HTMLInputElement).value).toBe(MainContainer.properties.width.toString());
-    expect(propertyHeight).toBeDefined();
-    expect((propertyHeight as HTMLInputElement).value).toBe(MainContainer.properties.height.toString());
-  });
-
-  it('With multiple containers', () => {
-    const children: IContainerModel[] = [];
-    const MainContainer = {
-      children,
-      parent: null,
-      properties: {
-        id: 'main',
-        parentId: '',
-        x: 0,
-        y: 0,
-        width: 2000,
-        height: 100
-      },
-      userData: {}
-    };
-
-    children.push(
-      {
-        children: [],
-        parent: MainContainer,
-        properties: {
-          id: 'child-1',
-          parentId: 'main',
-          x: 0,
-          y: 0,
-          width: 0,
-          height: 0
-        },
-        userData: {}
-      }
-    );
-
-    children.push(
-      {
-        children: [],
-        parent: MainContainer,
-        properties: {
-          id: 'child-2',
-          parentId: 'main',
-          x: 0,
-          y: 0,
-          width: 0,
-          height: 0
-        },
-        userData: {}
-      }
-    );
-
-    render(<ElementsSidebar
-      MainContainer={MainContainer}
-      isOpen={true}
-      isHistoryOpen={false}
-      SelectedContainer={MainContainer}
-      onClick={() => {}}
-      onPropertyChange={() => {}}
-      selectContainer={() => {}}
-    />);
-
-    expect(screen.getByText(/Elements/i));
-    expect(screen.queryByText('id')).toBeDefined();
-    expect(screen.getByText(/main/i));
-    expect(screen.getByText(/child-1/i));
-    expect(screen.getByText(/child-2/i));
-  });
-
-  it('With multiple containers, change selection', () => {
-    const children: IContainerModel[] = [];
-    const MainContainer: IContainerModel = {
-      children,
-      parent: null,
-      properties: {
-        id: 'main',
-        parentId: '',
-        x: 0,
-        y: 0,
-        width: 2000,
-        height: 100
-      },
-      userData: {}
-    };
-
-    const child1Model: IContainerModel = {
-      children: [],
-      parent: MainContainer,
-      properties: {
-        id: 'child-1',
-        parentId: 'main',
-        x: 0,
-        y: 0,
-        width: 0,
-        height: 0
-      },
-      userData: {}
-    };
-    children.push(child1Model);
-
-    let SelectedContainer = MainContainer;
-    const selectContainer = vi.fn((container: IContainerModel) => {
-      SelectedContainer = container;
-    });
-
-    const { container, rerender } = render(<ElementsSidebar
-      MainContainer={MainContainer}
-      isOpen={true}
-      isHistoryOpen={false}
-      SelectedContainer={SelectedContainer}
-      onClick={() => {}}
-      onPropertyChange={() => {}}
-      selectContainer={selectContainer}
-    />);
-
-    expect(screen.getByText(/Elements/i));
-    expect(screen.queryByText('id')).toBeDefined();
-    expect(screen.getByText(/main/i));
-    const child1 = screen.getByText(/child-1/i);
-    expect(child1);
-    const propertyId = container.querySelector('#property-id');
-    const propertyParentId = container.querySelector('#property-parentId');
-    expect((propertyId as HTMLInputElement).value).toBe(MainContainer.properties.id.toString());
-    expect((propertyParentId as HTMLInputElement).value).toBe('');
-
-    fireEvent.click(child1);
-
-    rerender(<ElementsSidebar
-      MainContainer={MainContainer}
-      isOpen={true}
-      isHistoryOpen={false}
-      SelectedContainer={SelectedContainer}
-      onClick={() => {}}
-      onPropertyChange={() => {}}
-      selectContainer={selectContainer}
-    />);
-
-    expect((propertyId as HTMLInputElement).value === 'main').toBeFalsy();
-    expect((propertyParentId as HTMLInputElement).value === '').toBeFalsy();
-    expect((propertyId as HTMLInputElement).value).toBe(child1Model.properties.id.toString());
-    expect((propertyParentId as HTMLInputElement).value).toBe(child1Model.properties.parentId?.toString());
-  });
-});