Hello,
You have the only sipmple plugin to removes the ? nofollow ? attribute on comments and authors.

But unfortunattely it is not adapted to last WP version. Could you please update it to new settings, roles & capabilities standards ?

Here are some errors I found with debug.log:

PHP Notice: options.php was called with an argument that is deprecated since version 2.7.0?! The remove_nofollow_comment setting is unregistered. Unregistered settings are deprecated. See https://codex.www.ads-software.com/Settings_API in /…/wp-includes/functions.php on line 4045

PHP Notice: has_cap was called with an argument that is deprecated since version 2.0.0?! Usage of user levels is deprecated. Use capabilities instead. in /…/wp-includes/functions.php on line 4045