Error when specifying Privacy Policy page

When I try to specify the privacy policy page on my website I get the following errors:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: call_user_func_array() expects parameter 1 to be a valid callback, array must have exactly two members in /home/harvardb/public_html/wp-includes/plugin.php on line 199

Warning: Cannot modify header information – headers already sent by (output started at /home/harvardb/public_html/wp-includes/plugin.php:199) in /home/harvardb/public_html/wp-includes/pluggable.php on line 896