https://wccftech.com/windows-10-version-2004-kb4571744-build-19041-488-preview-is-out/

Microsoft releases Previews of the Patch Tuesday updates a few weeks ahead of the scheduled release. While Previews of September Patch Tuesday updates went live on August 20 for most versions of the operating system, the latest Windows 10 May 2020 Update (version 2004) is only now receiving this update.

Windows 10 version 2004 Build 19041.488 (KB4571744) is now live in Preview. This update aims to fix a ton of bugs including the unresponsive Windows Update process and File Explorer issues.