error: tw-recent-posts-widget/tw-recent-posts-widget.css?ver=1.0.5

This is showing up on inspecting the code. It’s also hanging up my website in speed tests :

Failed to load resource: the server responded with a status of 404 (Not Found) wp-content/plugins/tw-recent-posts-widget/tw-recent-posts-widget.css?ver=1.0.5

https://www.ads-software.com/plugins/tw-recent-posts-widget/