"DirectX 12 with Feature Level SM6 is not supported on your system" Error
Unfortunately, Solasta II requires DirectX12 SM6 to work - and the game prevents itself from starting if your PC does not support this feature.
The issue itself is usually caused by an outdated version of Windows, an outdated graphic card or an outdated laptop, so try updating your drivers if they aren't up-to-date before launching the game again.
If this doesn't fix it, you may not have an SM6 compatible graphic card / OS. There is no workaround as we know for now, as allowing players to launch the game without it (like forcing -DX11 in the launch option) would likely make the game playable for a little while before encountering crashes due to the game being built with the latest features of Unreal 5 which require Shader Model 6 (SM6). Our studio is unfortunately too small to support two different pipelines, one with SM6 and one without.