I am having this issue with Repeater fields for ACF. I have amde a custom post type with repeater fields and every so often they will not load in the back-end of WordPress.I cannot see the text input boxes to add them and the page is only loads to where the repeater fields are supposed to be. After a non-specific period they are editable again.
In apache logs I get an error message:
[Thu Nov 13 16:18:38 2014] [error] [client ??.??.??.??] PHP Fatal error: Cannot call overloaded function for non-object in /home/sites/wordpress/xxxxxx/wordpress/wp-content/plugins/acf-repeater/views/field.php on line 236, referer: http://www.xxxxxx.com/wp-admin/edit.php?post_type=crossing&paged=2
I am using the latest version of ACF and repeater fields plugin.