TYPO3 Flux render column in page menu

Layout.html

{namespace v=FluidTYPO3\Vhs\ViewHelpers}
<f:layout name="Page" />

<v:page.menu entryLevel="0">
    <ul class="nav-main">
        <f:for each="{menu}" as="subPage" iteration="mainIteration">
            <li class="{f:if(condition:'{subPage.hasSubPages}', then:'hassub')}{f:if(condition:'{mainIteration.isFirst}', then:' first')}{f:if(condition:'{mainIteration.isLast}', then:' last')} {subPage.navigation_layout}">
                <f:link.page pageUid="{subPage.uid}">{subPage.title}</f:link.page>
            </li>
            <v:content.render column="3" pageUid="{subPage.uid}" />
        </f:for>
    </ul>
</v:page.menu>

<f:render section="Main" />

Page.html

<div xmlns:f="http://typo3.org/ns/TYPO3/Fluid/ViewHelpers" xmlns:v="http://typo3.org/ns/FluidTYPO3/Vhs/ViewHelpers"
     xmlns:flux="http://typo3.org/ns/FluidTYPO3/Flux/ViewHelpers"
     xmlns="http://www.w3.org/1999/xhtml"
     lang="en">

    <f:layout name="Page"/>

    <f:section name="Configuration">
        <flux:form id="standard">
            <!-- Insert fields, sheets, grid, form section objects etc. here, in this flux:form tag -->
        </flux:form>
        <flux:grid>
            <!-- Edit this grid to change the "backend layout" structure -->
            <flux:grid.row>
                <flux:grid.column colPos="3" name="menu"/>
            </flux:grid.row>
            <flux:grid.row>
                <flux:grid.column colPos="0" colspan="3" name="main"/>
                <flux:grid.column colPos="1" name="right"/>
            </flux:grid.row>
        </flux:grid>
    </f:section>

    <f:section name="Main">
        <h1>I am a page template!</h1>
        <p>
            My template file is EXT:menu_content_demo/Resources/Private/Page/Standard.html.
        </p>
        <div style="float: left; width: 75%;">
            <h2>Content main</h2>
            <v:content.render column="0"/>
        </div>
        <div style="float: left; width: 25%;">
            <h2>Content right</h2>
            <v:content.render column="1"/>
        </div>
    </f:section>
</div>