While "update your drivers" is standard advice, RDR2 is sensitive to specific versions.
The error code is a DirectX-related crash commonly associated with Red Dead Redemption 2 (RDR2) . It typically indicates that the game's graphics driver or the D3D (Direct3D) pipeline has failed to compile or load shaders properly. What Causes errgfxd3dshader1? errgfxd3dshader1 work
If you are using Vulkan, switching to DirectX 12 (or vice-versa) can bypass the specific D3D shader failure. While "update your drivers" is standard advice, RDR2
The most effective fix is to force the game to rebuild its shader library. errgfxd3dshader1 work