Hi,
I found a new bug for the Icon Picker field. In our theme we have a filter on the wp_get_attachment_image_url function.
When no image is selected, the value of $field[‘value’][‘value’] is NULL on line 169 of class-acf-field-icon_picker.php
<?php
$img_url = wp_get_attachment_image_url( $field['value']['value'], 'thumbnail' );
// If the type is media_library, then we need to show the media library preview.
?>
In our theme we have set $attachment_id as a required int. And therefor we get an critical error.
Is this a bug on your end, or do we need to allow also NULL for $attachment_id?
