Plugin Generates Constant PHP Warnings on Page View

[StarArmy]

I'm seeing thousands of these warnings in my error logs:

• PHP Warning: Undefined array key "" in /home/user/site/wiki/lib/plugins/loadskin/action.php on line 220
• PHP Warning: Undefined array key "REMOTE_USER" in /home/user/site/wiki/lib/plugins/loadskin/action.php on line 130

I'm running PHP 8.2 - I'm thinking this is because the plugin hasn't been updated in a long time and needs PHP8 compatibility upgrades.