Function highcharter::hciconarray does not produce the icons on the chart

Question

The code below is in the documentation of package highcharter to the topic hciconarray:

library(highcharter)
library(tidyverse)

 hciconarray(c("car", "truck", "plane"), c(75, 30, 20), icons = c("car", "truck", "plane")) %>%
   hc_add_theme(
     hc_theme_merge(
       hc_theme_flatdark(),
       hc_theme_null(chart = list(backgroundColor = "#34495e"))
     )
   )

I tried to play it, but the icons are not generated:

I tried it on two computers (one with Linux and one with Windows), with the latest versions of R and R Studio installed. But the problem persists in both.

• How to fix this problem and generate the chart with the icons normally?