Typo3 8.7.1 - Layouts werden falls gerandert

Hallo,

ich versuche in Typo3 8.7 folgende Layouts anzeigen zu lassen:
Default.html

<div class="page-wrapper">
    <header role="banner">
    <f:cObject typoscriptObjectPath="lib.headerimage" />
    </header>S

    <nav id="nav" role="navigation" class="clearfix">
         <f:cObject typoscriptObjectPath="lib.mainnav" />
    </nav>

    <f:render section="Main"/>
    <footer role="contentinfo">
        <div class="footerleft">
            <p><f:cObject typoscriptObjectPath="lib.meta" /></p>
        </div>
        <div class="footerright">
            <p class="copy">&copy;&nbsp;<f:cObject typoscriptObjectPath="lib.year" /></p>
        </div>
    </footer>

</div>

Homepage.html

<f:layout name="Default"/>

<f:section name="Main">

<div class="main" class="clearfix">
    <div class="mainContent" role="main">
        <f:format.raw>{maincontent}</f:format.raw>
    </div>

    <aside role="complementary">
        <f:render partial="Searchpart"/>
        <f:format.raw>{marginalie}</f:format.raw>
    </aside>

</div>
</f:section>

1Column.html

<f:layout name="Default"/>

<f:section name="Main">

   <div class="main" class="clearfix">
      <div class="mainContent1" role="main">
         <div>
            <f:cObject typoscriptObjectPath="lib.rootline" />
         </div>
         <f:format.raw>{maincontent}</f:format.raw>
      </div>
   </div>
</f:section>

Homepage wird mit Content praktisch nur mit

<div class="main" class="clearfix">
    <div class="mainContent" role="main">
        <f:format.raw>{maincontent}</f:format.raw>
    </div>

    <aside role="complementary">
        <f:render partial="Searchpart"/>
        <f:format.raw>{marginalie}</f:format.raw>
    </aside>

</div>

erzeugt. Das Drumherum (

<div class="page-wrapper">
<header role="banner">
    <f:cObject typoscriptObjectPath="lib.headerimage" />
    </header>

    <nav id="nav" role="navigation" class="clearfix">
         <f:cObject typoscriptObjectPath="lib.mainnav" />
    </nav>
<footer role="contentinfo">

fehlt alles.
Was ist da anders bei 8.7 gegenüber Typo3 7.6.16?

Grüße
DianiBeach