Here's the process:
Patcher runs, performs the pre-steps (checking path, stream, username, whatever), then attempts to restart itself with admin access (so it can actually edit the file system, registry, etc). This requires the user to grant access, and requires the user has such access themselves in the UI.
So it sounds like your system isn't allowed to modify the things we need, or you've denied the apps request to access them.
You may need to update your user permissions rather than just trying to run the patcher.exe app as admin (as when it restarts it will resume under standard permissions).
Might also be worth checking whether it's possible to 'save' the results on that admin request prompt. Maybe they clicked no at some point in the past and the OS is now remembering that and denying access