upgrade to 2.8 & database error

Hi,

I just upgraded to v.2.8
when i choose to use different theme, the error message appears in different places. For the theme I am currently using (Atahualpa 3.2), it showing on the very bottom of my site…….

can anyone help? what does this error message mean… i don’t really get it
thanks!
my site: https://www.chiachenwu.net/wordpress/

error message:
WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘order ASC’ at line 1 for query SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘category’) ORDER BY order ASC made by require, require_once, include, get_header, locate_template, load_template, require_once, dynamic_sidebar, call_user_func_array, wp_widget_mycategoryorder, wp_dropdown_categories, get_categories, get_terms WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘order ASC’ at line 1 for query SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘link_category’) AND tt.count > 0 ORDER BY order ASC made by require, require_once, include, get_footer, locate_template, load_template, require_once, dynamic_sidebar, call_user_func_array, wp_widget_mylinkorder, wp_list_bookmarks, get_terms