WDS Standalone - no boot files for the x64uefi

Hi,

I ran into a strange issue with the WDS as it failed to create files for the x64uefi architecture.

I have done following but still same issue 

1. Remove the WDS role

2. Remove the old RemoteInstall folder and create a new one (even on a separate partition).

3. Reinstalled the OS, this time everything should be defaults, but unfortunately, same result.

4. Permissions: I am using default Administrator account, so no issues with permissions.

5. Boot.WIM (its PE 1809 image, which was used on a different machine without issues). I can still boot a client in legacy boot mode but failed with UEFI boot (as WDS failed to create boot files for this architecture).

Any thoughts?