The game was running fine, but now reports two error messages when I attempt to launch.

The first message appears when the game is loading profile options. It reads:

No entry
'config.cpp/CfgVideoOptions/ShadowQuality/Disabled.shaderQuality'.

The second error message appears once the initial loading has completed, where the screen turns black; however instead of running the game, it crashes back to desktop with an error message that reads:

Error creating Direct3D 11 graphical engine