I am have a issue while instaling the theme kit from shopify when i try

$ theme new --password={your-passward} --store="{your-store-name -mysahopify.com}" --name=themek

{this is the error i am having on my terminal any quick fix?}

Unhandled Exception: System.ComponentModel.Win32Exception: The specified executa
ble is not a valid application for this OS platform.
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startIn
at shim.CommandExecutor.execute(String process, String arguments, String work
ing_directory, Boolean is_gui, Boolean wait_for_exit, Boolean requires_elevation
at shim.ShimProgram.Main(String args)