OpenWRT 19.07.4 & ubus device_tracker: res["ubus_rpc_session"] TypeError: 'NoneType' object is not subscriptable

[messismore]

Problem with UBUS Device Tracker

Thank you for your reply! Turns out I did not have all the required packages installed. When I wasn’t able to install uhttpd-mod-ubus ("Unknown package") I somehow assumed that it was no longer required for 19.x. Turns out I first had to update opkg. I guess that is going to be first contribution to the documentation