مشکل در استفاده از nordvpn

[dokanfile]

A JavaScript error occurred in the main process
Uncaught Exception:
Error: spawn nordvpn ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:232:19)
    at onErrorNT (internal/child_process.js:407:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)

[هومان]

خب الان این از کجا اومده؟
یکم توضیح بده