Difference in Thumb Generation (local / live)

I have the problem that the images on the server are partly not cut correctly or not at all. Locally everything looks as I would like. Only live just not.

Does anyone have an idea what this is? (Live Preview: www.dorfstattstadt.de




<div class="grid md:grid-cols-3 gap-8 mt-8">
      <?php foreach($pages->find('projekte')->children()->listed()->flip()->limit(3) as $project): ?>
        <?php $image = $project->gallery()->first()->toFile()->resize(700, 360) ?>
        <a href="<?= $project->url() ?>" class="group bg-primary-100 rounded hover:bg-primary-100 transition-bg duration-200 ease-linear">
          <img data-src="<?= $image->url() ?>" class="js-lazy rounded-t group-hover:opacity-75 transition-all duration-200 ease-linear block overflow-hidden">
          <div class="p-6">
            <p class="font-handwritten uppercase tracking-wider text-primary-base text-2xl"><?= $project->category() ?></p>
            <h3 class="font-black font-display"><?= $project->title() ?></h3>
            <p class="mt-2"><?= $project->text()->blocks()->excerpt(140) ?></p>
            <?php snippet('link', ['className' => 'mt-4', 'tag' => 'span', 'text' => 'Jetzt lesen']) ?>
      <?php endforeach ?>

Thumb driver missing? Are any of the images correctly resized (not only look correct, but the thumb actually exists in the right format)?