Uploaded older blog file – need help with errors

Received the following errors when I inadvertently uploaded an earlier copy of blog files along with my other website html updates…

Site no longer loads (visit https://blog.sarahwarshaw.com)

Is anyone up for the challenge? Here are the errors that I need help with:

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘index_rel_link’ was given in /homepages/2/d148864277/htdocs/blog/wp-includes/plugin.php on line 405

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘parent_post_rel_link’ was given in /homepages/2/d148864277/htdocs/blog/wp-includes/plugin.php on line 405

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘start_post_rel_link’ was given in /homepages/2/d148864277/htdocs/blog/wp-includes/plugin.php on line 405

Thank you in advance for any and all thoughts/suggestions!