Directory as Symbolic Link or Junction not recognised

I have a Project Template that I am developing and I would like to keep its directory outside of the C:\Program Files\Epic Games\UE_4.26\Templates directory, but also for it to be choosable in the “Create new project from template” wizard.

I have tried to achieve this through soft links:
mklink /D "C:\Program Files\Epic Games\UE_4.26\Templates\BUIProjectTemplate" "C:\Ben\BUIProjectTemplate"
and through Junctions:
mklink /J "C:\Program Files\Epic Games\UE_4.26\Templates\BUIProjectTemplate" "C:\Ben\BUIProjectTemplate"
but neither of them worked. The template does not appear in the template wizard. Moving the entire folder to the same path works, but I would like to avoid that.

Does anyone know what I’m doing wrong?