\Drupal calls should be avoided in classes, use dependency injection instead in modules/paragraphs_library/src/Controller/LibraryItemController.php file

Above patch applied successfully and looks fine for me.

Searching for LibraryItemController in the issue queue shows 4 or so duplicate issues of the same change, many of them older. Please search first before creating new issues and now at least help to clean those up as duplicates, thanks.