Moodle specification:
Version 3.9.x, 3.10.x
Theme: Enlightlite

changing in enlightlite/classes/core/course_renderer.php
search: top_course_menu

$sql = "SELECT a.category , a.cnt from ( SELECT category , count(category) as cnt FROM {course} C";
$sql .= " INNER JOIN {course_categories} cc ON cc.id = c.category WHERE category != 0 and c.visible <>1 and cc.visible<>1 group by category ) as a order by a.cnt desc ";