Hi Juliengaonach
Error MA1/4/40 is often due to a migration issue.
A few other people with this error have managed to perform the update by either removing the box from the mains for five minues and trying again, or by deleting a few recordings to make more space and then trying again.
You could also try turning off the V6 at switch; then on the V6 box hold down both the power button and the + buttons at the same time. Then turn on the V6 again whilst keeping hold of those buttons for a further 30 seconds.
The box should reboot, the power button will turn blue, and fingers crossed it will reset and boot up normally, and then hopefully install the 360 software update.
If that doesn't work it's probably a settings issue at the VM end. The software upgrade has been started but the billing system doesn’t know which account to tie your equipment to activate the box.
The Faults team may be able to fix this, if not they will escalate it to 2nd level support to fix it over the phone by sending a new update signal.
If that also fails it will need an engineer visit to change the box