Impossible to access an attribute ("name") on a null variable.
<div>{{ page.leistungsnachweis.kirbytextinline|raw }}</div>
</div>
{% endif %}
{% for additionalField in page.additionalFields.toStructure() %}
{% set field = site.additionalFieldsModule.toStructure().findBy('key', additionalField.type.value) %}
<div class="u-rowPadding">
<div class="u-uppercase">{{ field.name }}</div>
<div>{{ additionalField.text.kirbytextinline|raw }}</div>
</div>
{% endfor %}
{% if page.cover.isEmpty() == false %}
<div class="u-cover">
{% set coverImage = page.cover.toFile().resize(0, 600) %}