If you see that error on the start screen of the game without any scene or preset load, it's probably a problem with the game file itself. First of all, the path where the game folder is located looks pretty long in the picture you posted, so try to reduce this as much as possible. also, remove Az.Shader.Standard.zipmod cuz it causes a collision with xukmi's shader and I recommend you to update the latest version of the essential dll plugins you need
here. (e.g. material editor) if you want more detailed solution can be found in koikatsu! discord.