If you use an old version of our Raspberry Pi image, it may happen that you will not see our touchscreen interface, just a blue spinner. In this case your browser is too old.
Solution 1
Make a backup, install a new Raspberry Pi image and restore your backup to get the latest version.
Solution 2
Update your browser in a SSH console or use Global Settings Terminal in our GUI with these commands:
sudo apt update sudo apt install chromium-browser sudo reboot
Depending on the used image the newer browser might lead to a new issue showing an incognito screen instead of the app. If this happens, edit the autostart script.
nano /home/pi/.config/openbox/autostart
The relevant line looks like this:
chromium-browser --app-auto-launched --disable-pinch --noerrdialogs --disable-suggestions-service --disable-translate --disable-save-password-bubble --disable-session-crashed-bubble --disable-infobars --touch-events=disabled --disable-gesture-typing --kiosk --app=http://127.0.0.1:3344/modules/front2/app/app.html &
All you need to do is remove the –incognito parameter and reboot again.