I experience the same problem as this thread every help is appreciated.
The WiFI controller isnt found when installing the newest build (bluetooth works well) .
This mini pc is relatively new so it's strange that the WiFi drivers are not supported in LibreELEC.
LibreELEC (official): 8.2.3 (Generic.x86_64)
Link spec: Z83 II INTEL X5-Z8350 MINI PC
Model: Z83 II
Bios: YB1007 08/17/2017
Wifi chipset: Broadcom AP6255 + AP6212
dmesg | paste: http://ix.io/Sl5
lspci -nn | paste: http://ix.io/Fp