I cant'access my AP6-Pro

I can’t configure my AP6-Pro.

It does not appear manage.alta.inc account, I can’t connect the Alta App via bluetooth, and I can’t add it to the app via the serial number printed on the back of the device.
I can access the web-interface on the device, but that asks me for a “Set Controller URL:” and I can’t figure out what to put in there.
Any help?

Edit: In meantime the AP6 appeared under Network in the App. But I can’t get it to devices, where I assume that I can configure it.