I've just received this from Mazda
Dear Mazda Toolbox User,
We are happy to inform you that the map update installation error for your MZDConnect navigation system has been fixed.
1. If you made a purchase or redeemed a code and could not install the map, please start the Toolbox again, insert your SD card and log in. The Toolbox will automatically offer the purchased map for installation.
2. If you haven't purchased anything yet, you can now do so without any foreseen installation problems. Just start the Toolbox and follow the on-screen instructions to update your map.
New Sat Nav maps now fixed & ready to download