If you are experiencing an error related to loading the Skalla.dll, the most likely issue is that your CPU doesn't support the AVX2 instructions set required to run the game.
CPUs that support AVX2:
Intel Core series 4th generation and newer
AMD Ryzen 1st generation and newer
If you have a newer CPU than listed above and still get this error, please download Microsoft Visual C++ redistributable installer directly from Microsoft - link https://aka.ms/vs/17/release/vc_redist.x64.exe - and perform a repair of the files.