Fatal error: Uncaught Error: Call to undefined function is_plugin_active()
in /home/melcheap/public_html/wp-content/plugins/advanced-custom-fields-pro/includes/api/api-helpers.php on line 4224

Call stack:

  1. acf_is_plugin_active()
    wp-content/plugins/advanced-custom-fields-pro/pro/updates.php:51
  2. acf_pro_updates::init()
    wp-includes/class-wp-hook.php:303
  3. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:327
  4. WP_Hook::do_action()
    wp-includes/plugin.php:470
  5. do_action()
    wp-settings.php:578
  6. require_once()
    wp-config.php:100
  7. require_once()
    wp-load.php:50
  8. require_once()
    wp-blog-header.php:13
  9. require()
    index.php:17

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