404 page not found

i scan the website for issues and found a link /wp-content/plugins/kontur-copy-code-button/css/kontur-copy-code-button-frontend?ver=6.2.2 with 404 not found error this is a bit problematic for seo because is generated on all the pages of the website.

other then that the plugin is great doing the right job

The page I need help with: [log in to see the link]