WiFi connection issues

I’m not able to connect to WiFi with the app or a USB stick on my WR155.

When trying to connect with the app I tap the ‘Press OK to start app link’ but the 'App Link running use app to connect' screen is completely skipped and it goes straight to the ‘App link successful’ screen. Meanwhile the app is still waiting for the communication from the mower that should happen during the ‘App link running’ screen and so the app eventually times out.

Also, when inserting the usb drive with the wifi configuration file. The mower just shows the error for the battery door being open (because the USB stick prevents it from being closed). And after removing the USB and closing the door nothing changes.

I was able to install the v3.36 firmware with the USB drive so I assume it can detect the configuration file. Does anyone know what I can do?