The following issue can still be reproduced on 2.0.19 and it's related to the error encountered on Profile.template.php when accessing user statistics:
https://www.simplemachines.org/community/index.php?topic=565120.0
You may want to include this fix (https://github.com/SimpleMachines/SMF2.1/pull/5443) in a future SMF 2.0.x patch, it's a very small one and it works fine.
Find:
<div class="profile_pie" style="background-position: -', ((int) ($activity['percent'] / 5) * 20), 'px 0;" title="', sprintf($txt['statPanel_topBoards_posts'], $activity['posts'], $activity['total_posts'], $activity['posts_percent']), '">
Replace with:
<div class="profile_pie" style="background-position: -', ((int) ($activity['posts_percent'] / 5) * 20), 'px 0;" title="', sprintf($txt['statPanel_topBoards_posts'], $activity['posts'], $activity['total_posts'], $activity['posts_percent']), '">
Note: SMF 2.1 has the fix since 2019.