SQL gives Missing operator error

"SELECT * " +
"FROM IngredientRecipe " +
"INNER JOIN Product ON IngredientRecipe.ProductName = Product.ProductName " +
"INNER JOIN Recipe ON IngredientRecipe.ProductName = Recipe.ProductName " +
$"WHERE IngredientRecipe.ProductName IN ({RecipeString}) AND IngredientName IN ({IngredientsString})";

"SELECT * " +
"FROM IngredientRecipe " +
"INNER JOIN Product ON IngredientRecipe.ProductName = Product.ProductName " +
$"WHERE IngredientRecipe.ProductName IN ({RecipeString}) AND IngredientName IN ({IngredientsString})";