FScreenSpaceData in Material Custom Expression Does Not Work in 4.19p2

When creating a Post Process material in 4.19 with a Custom expression that uses FScreenSpaceData, material editor is unable to compile, and material renders incorrectly. This does not happen in 4.18.

1. In 4.19, Create a new Post Process Material, open it in material editor
2. Create a Custom Material Expression
3. Set up according to attached screen shot 
4. Code:

   FScreenSpaceData ssd = GetScreenSpaceData(centerUV, false);
   float3 N = ssd.GBuffer.WorldNormal;
   return N;

Result: Warning message appears saying material has compilation errors, does not render correctly in viewport as shown in attached screen shot. 

Expected: See attached screen shots showing the exact same material setup in 4.18.

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