add_ci() poor messaging and unexpected new column

[ddsjoberg]

library(gtsummary)
packageVersion("gtsummary")
#> [1] '1.7.0'


trial |> 
  tbl_summary(
    include = c(response, age)
  ) |> 
  add_ci(include = age) |> 
  as_kable()
#> There was an error for variable 'response':
#> Error in summary_type[[variable]]: subscript out of bounds
#> ✖ `add_ci()` added mean CI for "age"; however, no mean is shown in the `tbl_summary()` table.

Characteristic	N = 200	95% CI	add_stat_1
Tumor Response	61 (32%)
Unknown	7
Age	47 (38, 57)	45, 49
Unknown	11

^{Created on 2023-04-07 with reprex v2.0.2}