First Go onto Discover store and search for ProtonUp-Qt. When it installs launch it up and add steam tinkerlaunch as a proton, after this go onto steam (restart if its not in properties and set, compatibility as steamtinkerlaunch. Next go to launch options and set : steamtinkerlaunch %command%.

Next, launch the game> steamtinkerlaunch should show, press settings and go to game menu. On the game menu scroll down and enable Now wait for it to install then proceed to save and play. FWS should launch, press okay. Now, on the right go to available plugins and download Fable Anniversary

Change your settings to your liking and proceed to play the game.

If you need help comment below and if i helped pass it on :D