why this on only SheetData model? Conform SheetData to ReflectionDecodable: extension SheetData: ReflectionDecodable { }.
models: https://gist.github.com/lahariganti/2cc0afe477017fe0293eac8676e7e78c
configure: https://gist.github.com/lahariganti/697cd1f6deb911b0a920513d6f9211ac
solution 1: change [SheetData] to SheetData in Language → LOL
solution 2: add the [SheetData] variable as a column via the console