I’m getting a very similar crash when I try to hook up a SceneTexture:WorldNormal node in a substrate decal material and have anything hooked up to the emissive output.
Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\RHICore\Public\RHICoreShader.h] [Line: 178]
LogWindows: Error: Uniform buffer bound to slot 3 is not what the shader expected:
LogWindows: Error: Bound : Uniform Buffer[FShadowDepthPassUniformParameters] with Hash[0x1d501e25]
LogWindows: Error: Expected : Uniform Buffer[Substrate] with Hash[0x09701141]
LogWindows: Error: Shader Name : <unknown>
This is happening in the 5.5 preview as well, unfortunately.
Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\RHICore\Public\RHICoreShader.h] [Line: 198]
Shader expected a uniform buffer at slot 1 but got null instead (Shader='<unknown>' UB='Substrate'). Rendering code needs to set a valid uniform buffer for this slot.
Edit: I just updated my material to use the substrate slab, and now I see the exact same error message as OP.
LogWindows: Error: Uniform buffer bound to slot 2 is not what the shader expected:
LogWindows: Error: Bound : Uniform Buffer[FSceneUniformParameters] with Hash[0x008c1f51]
LogWindows: Error: Expected : Uniform Buffer[Substrate] with Hash[0x09701141]
LogWindows: Error: Shader Name : <unknown>
LogWindows: Error: Layout CB Size : 128
LogWindows: Error: Layout Num Resources : 10
LogWindows: Error: Resource Types : 16 16 16 16 16 16 16 12 12 8```