somethings wrong!, try again please

When trying to reorder fields using drag and drop I get this message

somethings wrong!, try again please

I also have the following in my PHP error log.

[21-Dec-2014 06:57:00 UTC] PHP Deprecated:  Function split() is deprecated in C:\WWW\wp\wp-content\plugins\magic-fields-2\admin\mf_ajax_call.php on line 20
[21-Dec-2014 06:57:00 UTC] PHP Stack trace:
[21-Dec-2014 06:57:00 UTC] PHP   1. {main}() C:\WWW\wp\wp-admin\admin-ajax.php:0
[21-Dec-2014 06:57:00 UTC] PHP   2. do_action() C:\WWW\wp\wp-admin\admin-ajax.php:85
[21-Dec-2014 06:57:00 UTC] PHP   3. call_user_func_array() C:\WWW\wp\wp-includes\plugin.php:496
[21-Dec-2014 06:57:00 UTC] PHP   4. mf_ajax_call() C:\WWW\wp\wp-includes\plugin.php:496
[21-Dec-2014 06:57:00 UTC] PHP   5. mf_ajax_call->resolve() C:\WWW\wp\wp-content\plugins\magic-fields-2\main.php:253
[21-Dec-2014 06:57:00 UTC] PHP   6. mf_ajax_call->mf_sort_field() C:\WWW\wp\wp-content\plugins\magic-fields-2\admin\mf_ajax_call.php:12

However, in spite of these error messages the new order is correctly saved to the database so it is not a major problem.

mc

https://wordpress.org/plugins/magic-fields-2/