Error Mycloud - No Device

Buongiorno
Dopo aver configurato MyCloudEX2Ultra, riesco a contattarlo con MyCloud su smatphone, riesco ad accedere a dashboard, ma non riesco ad accedere a my cloud da pc.
Viene restituito il seguente errore.

Good morning
After configuring MyCloudEX2Ultra, I can contact him with MyCloud on smatphone, I can access the dashboard, but I cannot access my cloud from a PC.
The following error is returned.!
“no device available”
“please inform the device owner (or administrator)”