Reports on GitHub suggest that the recent cumulative update for Windows 10 version 2004 is breaking Windows Subsystem for Linux 2 (WSL 2), which can be solved by uninstalling KB4571756.
Build 19041.508 RSS
Today, Microsoft released all new cumulative updates for all supported versions of Windows 10, meaning every version except for one. Of course, that's because today is the second Tuesday of the month.