Navigation fail on Sync

I updated my sync to version 3.4 and the navigation was crashing. My car has navigation. I’ve tried several procedures, reset the system, etc. I also downgraded to version 3.3, and sometimes the map works, sometimes it doesn’t. The failure sometimes appears. My map is ANZ. What can I do?

Welcome to the forum!!

Post a pic of your IVSU screen

What region was you on before hand?

ANZ, South America, Brazil.

I lost my ivsu, but I have a friend who have sync 3. Can I use his ivsu?

Sorry my bad English