Error in FUN: Expected a recursive structure built of NULLs, lists and dependencies

I want to make a template of some container because I need it a lot. The Id in my function is the id of selectInput so it will be easier for the backend. How do I resolve this error? Error in FUN: Expected a recursive structure built of NULLs, lists and dependencies

simSettingCard <- function(title, id, size = 12, style = "style.css") {
  div(
    class = glue("card ms-depth-8 ms-sm{size} ms-xl{size}"),
    style = style,
    Stack(
      tokens = list(childrenGap = 5),
      Text(variant = "xLarge", title, block = TRUE, class = "card-title"),
      selectInput(
        id,
        label = "mg/dl",
        choices = c(bg_waarde, NULL),
        selected = NULL
      ),
    )
  )
}

simSettingCard(
   "T-60",
   "bgvalue-60"
)