Bosch Nyon and W-LAN
I was able to connect to an unsecured WLAN with my Nyon. I updated the Nyon and tried to connect to a secured network again, but no luck! I'll try to contact Bosch support about that problem too. I see following possible workaround's in the mean time:


If you only need to sync your cycling data, you can use the mobile app and connect via Bluetooth.
If possible with your WLAN router, enable an unsecured guest network and connect your Nyon to it. Switch off the guest network if you don't use it anymore.
Remove security from your WLAN while you need a connection from your Nyon. Don't forget to restore security settings, as soon you are done working with your Nyon!


Be aware that as long as you run a unsecured everybody within reach of your WLAN router can access your network and listen to the traffic on this network. Best stick with mobile app/bluetooth and use unsecured WLAN only to download maps or update the Nyon software.