Template for express_entry_detail

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Hi everyone
I have set up express objects for a page and stitched together a custom template for the express_entry_detail block following Andrew's tutorial.

As long as I use the standard template, the results show just fine. As soon as I apply my template, the area goes blank - no code found in the inspector apart from bootstrap container layout.

I am using C5 8.5.1 running on php version 7.1.30.

This is what my code looks like:
<?php defined('C5_EXECUTE') or die(_("Access Denied.")); ?>
<?php
if (isset($renderer) && isset($entry) && is_object($entry)) {
    $ausflugsziele = $entry->getAusflugsziele();?>
    <div>
        <?php if (count($ausflugsziele)){
            foreach($ausflugsziele as $ausflugsziel) { ?>
                <div>
                    <?=$ausflugsziel->getAusflugszielName()?>
                </div>
                <div>
                    <?=$ausflugsziel->getAusflugszielBild()?>
                </div>
                <div>
                    <?=$ausflugsziel->getAusflugszielBeschreibung()?>


What is missing? I have basic knowledge of php, but I am not a programmer ;D

pixeljunkie