Greetings, good folks!
I, too, have this annoying little problem.
There is one thing that seems a wee bit different with my difficulties than others:
I am running OSMC, as installed via NOOBs alongside Raspbian.
The good news is: I can freely and easily connect to my router with Raspbian every time.
The Bad news: No Wifi Love with OSMC.
I have tried the solutions above with no luck.
connmanctl installed, as well as usbutils.
Cat6 cable direct to the router so I can use Putty to connect and run those updates (including the update for OSMC itself to the most current version.
Perhaps I am simply missing a module for the Wifi itself that’s not the same code as the RPi3B (it’s previous iteration).
If there’s any info to that effect that can “easily” fix this, I’m quite open to its application!
Thanks in advance!