Hello,

I have the same issue with "cracked" unlocked maps available here and on other forums.
There is no cure so far, like for standalone Garmin units, as the firmware is for both headunit and GPS part of said unit and cannot be patched that easily to remove this extra layer of protection.

However, loading all the extra files from the same map release works without issues, if your hardware can handle it - for example, updating maps through Garmin Express app would not download JCV files, but after putting them on an SD card manually I have junction view during navigation, etc.