Niagara compiler error, branch in custom hlsl doesn't work properly

Open the Niagara System Asset(5.3+) in the attached file, Compile, and you'll see the comiler error.

Inside the if block, if I set the 4 components of the linear color together, there won't be a problem, or, if I set it separately but disconnect the input and use a constant value, there won't be a problem too.

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[UE-23848] Bug Status

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Bonjour j'ai un petit problème c'est que je ne vois plus l'onglet "scability" pour changer les graphismes de uefn et j'ai pas trouvé l'option pour le faire revenir ?

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