Backstage some commands do not work

Hi folks, we've noticed that Backstage doesn't accept certain commands. For example vssadmin doesn't work, we get an error saying that the command is not recognized.

If you check the system32 directory in Backstage, the vssadmin command indeed does not exist.

However, if I run the vssadmin command on the same computer from an actual CMD prompt, vssadmin command does work and also I can see it in c:\windows\system32 on the computer.

It seems Backstage does not show or support all the commands that the computer actually has. Please can you look into this?