https://wccftech.com/windows-10-patch-tuesday-update-breaks-wsl-2-for-some-users/

Microsoft released its scheduled monthly Windows 10 cumulative updates yesterday for all the supported versions of the operating system, including its latest May 2020 Update and the upcoming 20H2. According to some reports, however, KB4571756 released for version 2004 is breaking WSL 2 functionality for some users.

Users are seeing an "Element not found" error with Windows Subsystem for Linux 2 (WSL 2) after installing last night's update. Until Microsoft addresses the issue, you can uninstall last night's Patch Tuesday update to fix the problem.