Critical Error during game start.

When attempting to load the game, I'm met with the following error:

Critical error during game start

"Sharing violation on path C:\Program Files (x86)\Steam\steamapps\common\War For The Overworld\WFTOGame_Data\GameData\Options.txt"

The game cannot start.

I have checked the file and cannot find any issues with the contents. In case I'm missing something though, it reads as follows;

FirstLaunchLanguageDetection=
Lang=0
HoGLaunched=True
DLC=HeartOfGold
Screen Width=1920
Screen Height=1080
Screen Refresh Rate=60
FullScreenMode=True
Gamma=20
V-Sync=True
Camera Zoom Max=30
Editor Camera Zoom Max=50
Needs Pixel Light Upgrade=False
Pixel Light Count=10

This is the same computer that I have used to play the game for many hours before with no issues. I'm at a loss of what could be the cause of this issue.