Can't edit links in WordPress – error log

I am trying to edit links in my WP site and it’s not working. Went to the error log and have gotten several exact messages like this:

[16-May-2014 07:10:17] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘wp_ajax_autosave’ was given in /home2/trainit6/public_html/wp-includes/plugin.php on line 429

First, how do I fix it, and second, would this be the problem with the inability to edit links?

Thanks!