When you tell the meter to hibernate, it goes back in to Hibernation or “Shipping Mode”, where you have to wake it up by shorting out the C and Ω inputs. In this mode the meter is not broadcasting and cannot be connected to. Can you try to wake your meter again?
For future reference – when you disconnect from the meter by hitting the “back” button to take you back to the Scan page, the meter goes in to standby and remains connectable. You don’t need to hibernate it after you’re done using it every time.