Hi,
App.view.xml "sap.ui.layout.form" is validated
Kindly check the code, error screen shots in editor.
<mvc:View
displayBlock="true"
xmlns:mvc="sap.ui.core.mvc"
xmlns:l="sap.ui.layout"
xmlns:f="sap.ui.layout.form"
xmlns:core="sap.ui.core"
xmlns="sap.m"
controllerName="myapp.controller.App">
<App>
<pages>
<Page title="openSAP - Developing with SAPUI5">
<content>
<IconTabBar
id="idTopLevelIconTabBar">
<items>
<IconTabFilter id="start" text="{i18n>gettingStartedFilter}">
<Image>
src=""https://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Wikipedia_Hello_World_Graphic.svg/2000px-Wikipedia_Hello_World_Graphic.svg.png"
height="600px"
</Image>
<Button
text="{i18n>showHelloButtonText}"
press="onShowHello"/>
<Input
value="{helloPanel>/recipient/name}"
description="Hello {helloPanel>/recipient/name}"
valueLiveUpdate="true"
width="60%"/>
</IconTabFilter>
<IconTabFilter id="layouts" text="{i18n>layoutFilter}">
<MessageStrip
type="Information"
showIcon="true"
text="Here's a Form Layout inside an Icon Tab Bar …"/>
<f:SimpleForm id="simpleFormChange"
title="Address"
editable="true"
class="editableForm">
<f:content>
<Label text="{i18n>layoutFormName}"/>
<Input value="{address>/Name}"/>
<Label text="{i18n>layoutFormStreet}"/>
<Input value="{address>/Street}"/>
<Label text="{i18n>layoutFormHouseNumber}"/>
<Input value="{address>/HouseNumber}"/>
<Label text="{i18n>layoutFormZIPCode}"/>
<Input value="{address>/ZIPCode}"/>
<Label text="{i18n>layoutFormCity}"/>
<Input value="{address>/City}" />
<Label text="{i18n>layoutFormCountry}"/>
<Select>
<items>
<core:Item text="{i18n>layoutCountryGermany}"/>
<core:Item text="{i18n>layoutCountryUSA}"/>
<core:Item text="{i18n>layoutCountryEngland}"/>
</items>
</Select>
</f:content>
</f:SimpleForm>
<Toolbar>
<ToolbarSpacer/>
<Button
text="{i18n>layoutPublishButton}"
type="Accept"/>
<Button
text="{i18n>layoutDraftButton}"/>
</Toolbar>
</IconTabFilter>
</items>
</IconTabBar>
</content>
</Page>
</pages>
</App>
</mvc:View><br>
app-view.png 2nd half: view-2.png
Thanks
Kaushik
SAP Fiori/EP