Hi Dion,
I am Sumit, an Independent Advisor and a 2-Year Windows Insider MVP here to help.
Probably related.
https://docs.microsoft.com/en-us/windows/releas...
Windows Sandbox may fail to start with error code “0x80070002”
Windows Sandbox may fail to start with "ERROR_FILE_NOT_FOUND (0x80070002)" on devices in which the operating system language is changed during the update process when installing Windows 10, version 1903.
Affected platforms:
Client: Windows 10, version 1903
Next steps: We are working on a resolution and will provide an update in an upcoming release.
Back to top OS Build 18362.116
May 20, 2019
KB4505057 Investigating
Last updated:
June 10, 2019
06:06 PM PT
Opened:
May 24, 2019
04:20 PM PT
You are advised to wait for the next releases to fix this.