I test it out on forge 1.12.2 - 14.23.2.2611 and 1.12.2 - 14.23.2.2641 & optfine 1.12.2 HD U C9 and 1.12.2 HD U D1. Nothing fixed. Would you able to fix the conflict with shader? I cannot play MC without shaders, so PLEASE.

No.

Use the "weakSkyRender" config option in AS to attempt compatibility. AS utilizes shaders to function, and that is the furthest support will ever go for that.