Hi there and welcome
It is saying due to an issue on the device it needs to connect to Garmin Express which is a program for the computer
You can install this via my link below
Once installed, open it and connect the Nuvi to your computer
The software will then connect with it and update it.
Do this and it should then work again
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.