Plugin crashes when get_fields is called in loop

I’m using get_fields in a loop like this:

foreach($frontpage_posts as $post) : ?>

   <?php
      // do foo here
      $timetoshow = '';
      if($cat[0]->slug === 'some_slug') {
         $acf = get_fields($post->ID);
         $timetoshow = $acf['my_field'];
      } else {
         $timetoshow = date('d.m.Y', strtotime($post->post_date));
      }
   ?>

   <!-- html output here... -->

<?php endforeach; ?>

When doing that, it crashes with the following error:

Fatal error: Uncaught Error: Call to a member function init() on array in /my/host/wp-content/plugins/advanced-custom-fields/includes/api/api-helpers.php:209

Stack trace:
#0 /my/host/wp-content/plugins/advanced-custom-fields/includes/api/api-template.php(310): acf_init()
#1 /my/host/wp-content/plugins/advanced-custom-fields/includes/api/api-template.php(269): get_field_objects(85, true)
#2 /my/host/wp-content/themes/fwrhs/index.php(77): get_fields(85)
#3 /my/host/wp-includes/template-loader.php(106): include(‘/var/www/vhosts…’)
#4 /my/host/wp-blog-header.php(19): require_once(‘/var/www/vhosts…’)
#5 /var/ww in /my/host/wp-content/plugins/advanced-custom-fields/includes/api/api-helpers.php on line 209

The post looks just fine to me, any ideas what might cause this?

• This topic was modified 4 years, 5 months ago by flomei.
• This topic was modified 4 years, 5 months ago by flomei. Reason: format code