"$0025 cant get semaphore for control of efi_hapi" usually means the device is busy (i.e. being re-programmed with new firmware) when you tried to access it from the V8 software. Ot that the firmware re-programming did not complete successfully.

Try programming the firmware again like this:
Power up V2 while holding down the Ctrl key on the keypad to start it up in dead-poll mode (two orange LEDs flashing).
Use EFILive Explorer to program in the V2.07.xxx firmware - wait until it competes (30 seconds to 1 minute) and the V2 device should reboot automatically - after that it should be fully functional.