Route calculation error on Forerunner 965 after updating to 20.29

Hi everyone,

Since updating my Garmin Forerunner 965 to version 20.29, I've been experiencing issues with the navigation feature. Either it won't start at all, or it starts but shuts down after a few minutes, displaying the following message:

"Route calculation error. Missing routable roads in this area."

The issue is not related to my location, as I’m on normal public roads where navigation has always worked perfectly fine in the past. I've already reinstalled the maps via Garmin Express, as suggested in another thread, but the issue still persists.

Has anyone encountered this problem or have any other ideas on how to resolve it?

Thanks in advance!