Impossible to invoke a method ("resize") on a null variable.
{% extends "@snippets/content-blocks/_base-block.twig" %}
{% block content %}
<div class="md:max-w-[70vw] xl:max-w-[1024px] mx-auto my-[80px]">
{% if block.content.image.isNotEmpty() %}
<figure class="my-0 mb-2">
<img src="{{ block.content.image.toFile.resize(800,null,90).url }}" alt="{{ block.content.alt }}" class="w-full"/>
</figure>
{% endif %}
{% if block.content.caption != '' %}
<div class="max-w-[500px] mx-auto">{{ block.content.caption | nl2br }}</div>
{% endif %}
</div>