English: Sometimes Autoptimized JS/ CSS is referenced in cached HTML but is already removed, resulting in broken sites. With this option on, Autoptimize will try to redirect those not-found files to "fallback"-versions, keeping the page/ site somewhat intact. In some cases, this will require extra web-server level configuration to ensure %1$swp-content/autoptimize_404_handler.php%2$s is set to handle 404's in %1$swp-content/cache/autoptimize%2$s.
Dutch: Soms wordt Autoptimized JS/ CSS verwezen in gecachte HTML maar is het al verwijderd, wat resulteert in gebroken sites. Met deze optie ingeschakeld, zal Autoptimize proberen om die niet-gevonden bestanden om te leiden naar "fallback" versies, waardoor de pagina/ site enigszins intact blijft. In sommige gevallen vereist dit extra configuratie op webserverniveau om ervoor te zorgen dat %1$swp-content/autoptimize_404_handler.php%2$s is ingesteld om 404's te verwerken in %1$swp-content/cache/autoptimize%2$s.