I have the same problem on Zenec Z-N720. Navigation can be installed, but allways cannot find any maps.
Spoiler: pic
Problem with cards is gone. I made a mistake. I needed a extra content folder in root of SDcard. That works now. But know I got another problem. When screen is started and I go to settings and than to voice the screen becomes blanck with stripes and freezes. After a few seconds device shutdown.
I have installed version iGO Primo Zenec 9.6.5.304111. It works without problems. Sound is good and no white screen anymore. But still the message cannot open maps with this license.
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