I got this error after upgrading

I got this error after upgrading the plugin:
WordPress database: [Table ‘<WPPREFIX>.wp_term_taxonomy’ doesn’t exist]

I resolved it by change line 29 in functions.php from

$expected_terms = $wpdb->get_results(“SELECT t.term_id FROM wp_term_taxonomy t WHERE t.taxonomy=’usercategories'”);

to

$expected_terms = $wpdb->get_results(“SELECT t.term_id FROM “. $wpdb->prefix . “term_taxonomy t WHERE t.taxonomy=’usercategories'”);