How to fix the MobileFormFactor Outlook Add-In manifest issue?

Question

I need help.
I am trying to follow the MS examples for Outlook Add-In development. The examples without the MobileFormFactor are working fine. As soon I add the MobileFormFactor element, the manifest file becomes invalid.

I am trying to upload the deploy add-in on MS admin to use it on mobile. On validated I am getting the manifest file is invalid.

The example from MS:

https://learn.microsoft.com/en-us/office/dev/add-ins/outlook/mobile-log-appointments?tabs=taskpane

I am using node ver 18.16.0

My manifest file is:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<OfficeApp xmlns="http://schemas.microsoft.com/office/appforoffice/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:bt="http://schemas.microsoft.com/office/officeappbasictypes/1.0" xmlns:mailappor="http://schemas.microsoft.com/office/mailappversionoverrides/1.0" xsi:type="MailApp">
  <Id>real_id_replaced</Id>
  <Version>1.0.0.0</Version>
  <ProviderName>Contoso</ProviderName>
  <DefaultLocale>en-US</DefaultLocale>
  <DisplayName DefaultValue="Outlook Test JS"/>
  <Description DefaultValue="A template to get started."/>
  <IconUrl DefaultValue="real_link_replaced/assets/icon-64.png"/>
  <HighResolutionIconUrl DefaultValue="real_link_replaced/assets/icon-128.png"/>
  <SupportUrl DefaultValue="https://www.contoso.com/help"/>
  <AppDomains>
    <AppDomain>https://www.contoso.com</AppDomain>
  </AppDomains>
  <Hosts>
    <Host Name="Mailbox"/>
  </Hosts>
  <Requirements>
    <Sets>
      <Set Name="Mailbox" MinVersion="1.1"/>
    </Sets>
  </Requirements>
  <FormSettings>
    <Form xsi:type="ItemRead">
      <DesktopSettings>
        <SourceLocation DefaultValue="real_link_replaced/taskpane.html"/>
        <RequestedHeight>250</RequestedHeight>
      </DesktopSettings>
    </Form>
  </FormSettings>
  <Permissions>ReadWriteItem</Permissions>
  <Rule xsi:type="RuleCollection" Mode="Or">
    <Rule xsi:type="ItemIs" ItemType="Message" FormType="Read"/>
  </Rule>
  <DisableEntityHighlighting>false</DisableEntityHighlighting>
  <VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
  <VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides/1.1" xsi:type="VersionOverridesV1_1">
    <Requirements>
      <bt:Sets DefaultMinVersion="1.3">
        <bt:Set Name="Mailbox"/>
      </bt:Sets>
    </Requirements>
    <Hosts>
      <Host xsi:type="MailHost">
        <DesktopFormFactor>
          <FunctionFile resid="Commands.Url"/>
          <ExtensionPoint xsi:type="AppointmentAttendeeCommandSurface">
            <OfficeTab id="TabDefault">
              <Group id="apptReadGroup">
                <Label resid="GroupLabel"/>
                <Control xsi:type="Button" id="apptReadOpenPaneButton">
                  <Label resid="TaskpaneButton.Label"/>
                  <Supertip>
                    <Title resid="TaskpaneButton.Label"/>
                    <Description resid="TaskpaneButton.Tooltip"/>
                  </Supertip>
                  <Icon>
                    <bt:Image size="16" resid="Icon.16x16"/>
                    <bt:Image size="32" resid="Icon.32x32"/>
                    <bt:Image size="80" resid="Icon.80x80"/>
                  </Icon>
                  <Action xsi:type="ExecuteFunction">
                    <FunctionName>logCRMEvent</FunctionName>
                  </Action>
                </Control>
                <Control xsi:type="Button" id="ActionButton">
                  <Label resid="ActionButton.Label"/>
                  <Supertip>
                    <Title resid="ActionButton.Label"/>
                    <Description resid="ActionButton.Tooltip"/>
                  </Supertip>
                  <Icon>
                    <bt:Image size="16" resid="Icon.16x16"/>
                    <bt:Image size="32" resid="Icon.32x32"/>
                    <bt:Image size="80" resid="Icon.80x80"/>
                  </Icon>
                  <Action xsi:type="ExecuteFunction">
                    <FunctionName>action</FunctionName>
                  </Action>
                </Control>
              </Group>
            </OfficeTab>
          </ExtensionPoint>
        </DesktopFormFactor>
        <MobileFormFactor>
          <FunctionFile resid="Commands.Url"/>
          <ExtensionPoint xsi:type="MobileMessageReadCommandSurface">
            <Control xsi:type="MobileButton" id="appointmentReadFunctionButton">
              <Label resid="residLabel"/>
              <Icon>
                <bt:Image size="25" scale="1" resid="Icon.16x16"/>
                <bt:Image size="25" scale="2" resid="Icon.16x16"/>
                <bt:Image size="25" scale="3" resid="Icon.16x16"/>
                <bt:Image size="32" scale="1" resid="Icon.32x32"/>
                <bt:Image size="32" scale="2" resid="Icon.32x32"/>
                <bt:Image size="32" scale="3" resid="Icon.32x32"/>
                <bt:Image size="48" scale="1" resid="Icon.48x48"/>
                <bt:Image size="48" scale="2" resid="Icon.48x48"/>
                <bt:Image size="48" scale="3" resid="Icon.48x48"/>
              </Icon>
              <Action xsi:type="ExecuteFunction">
                <FunctionName>logCRMEvent</FunctionName>
              </Action>
            </Control>
          </ExtensionPoint>
        </MobileFormFactor>
      </Host>
    </Hosts>
    <Resources>
      <bt:Images>
        <bt:Image id="Icon.16x16" DefaultValue="real_link_replaced/assets/icon-16.png"/>
        <bt:Image id="Icon.32x32" DefaultValue="real_link_replaced/assets/icon-32.png"/>
        <bt:Image id="Icon.48x48" DefaultValue="real_link_replaced/assets/icon-48.png"/>
        <bt:Image id="Icon.80x80" DefaultValue="real_link_replaced/assets/icon-80.png"/>
      </bt:Images>
      <bt:Urls>
        <bt:Url id="Commands.Url" DefaultValue="real_link_replaced/commands.html"/>
        <bt:Url id="Taskpane.Url" DefaultValue="real_link_replaced/taskpane.html"/>
      </bt:Urls>
      <bt:ShortStrings>
        <bt:String id="GroupLabel" DefaultValue="Contoso Add-in"/>
        <bt:String id="TaskpaneButton.Label" DefaultValue="Show Taskpane"/>
        <bt:String id="ActionButton.Label" DefaultValue="Perform an action"/>
        <bt:String id="residLabel" DefaultValue="Log to Contoso CRM"/>
      </bt:ShortStrings>
      <bt:LongStrings>
        <bt:String id="TaskpaneButton.Tooltip" DefaultValue="Opens a pane displaying all available properties."/>
        <bt:String id="ActionButton.Tooltip" DefaultValue="Perform an action when clicked."/>
      </bt:LongStrings>
    </Resources>

    
  </VersionOverrides>
  </VersionOverrides>
</OfficeApp>