I did a fresh install a few months ago on this Pi and had the same problem - no Wifi but I cracked it then. I can’t remember how.
Same issue thins time. A fresh install onto SD via Windoze. I preconfigured the Wifi, booted the Pi and it will not connect. It can see my SSID. If I select Configure Network Manually, I get an unhandled exception referring me to the logs but where? journalctl -xe
gives:
May 30 17:43:22 osmc preseed[553]: DBusException Raised: net.connman.Error.OperationTimeout: Operation timeout
May 30 17:43:22 osmc preseed[553]: DBusException Raised: net.connman.Error.OperationTimeout: Operation timeout
May 30 17:43:22 osmc preseed[553]: DBusException Raised: net.connman.Error.OperationTimeout: Operation timeout
It a bit boring as it repeats and repeats.
Last time, because of the problems I backed up a file wifi_b827eb298102_31345548_managed_psk but I do not see any useful file under /var/lib/conman and don’t know if I can assume the same name. I can’t find the post which lead me to the solution last time.
For the moment I have a wired connection to I can get to the files with PuTTy.