Hi.
I have 2 Garmin Nuvi 1340 satnavs
I have downloaded the latest Maps NT2021.20 from here.
Have loaded both the say navs with the appropriate files/maps in the same way.
One appears to work ok.
The other gives a message "Can't unlock maps" .
I have updated both using Garmin Express.
I have checked the content of both sat navs and cannot see any difference between them?
In desperation i copied all the files ...