Xbox Series 2 X Controller not detected in the Web Browser xcloud. LG C2 OLED 65"

[Xavier Williams]

As stated in the title. 
I can't connect my controller to the tv, however it says there may be some incompatibility issues. Which is interesting because it's listed in the compatible products on LG's webpage.
When I open the web browser and go to the Xbox xcloud site to play games. I hit 'ready to play' and it says that it can't detect the controller even though its connected to my TV.

Things I've tried: 
- Unplugging my TV from the wall for 5 minutes or so.
- Updating the TV to the latest software.
- Updating the controller to the latest software.
- Putting the controller USB stick into the TV and connecting it to the TV that way.
- Removing all wireless transmission devices away from the TV (except my Orbi or Wireless router, roughly 5 meters away from the TV)

I've seen a Youtube video of someone successfully connecting their controller and play xcloud on the web browser but i haven't had the same success.

Any ideas or solutions would be much appreciated.
Cheers