Unable to export to pdf for some fonts about hrbrthemes HOT 1 CLOSED

```{r setup, include=FALSE}
knitr::opts_chunk$set(dev=c('png', 'cairo_pdf'),  comment="", echo=T, warning=FALSE, cache=F, message=FALSE,  fig.path='figure/theme_test/')
library(hrbrthemes)
library(tidyverse)
library(extrafont)
library(Cairo)
#extrafont::loadfonts(quiet=TRUE, device='pdf')
library(ggplot2)
theme_set(theme_ipsum_rc())
``` ...

```{r }
g <- iris %>% ggplot(aes(Sepal.Length, Sepal.Width)) + geom_point()  + labs(caption='Caption')
g
ggsave('temp.pdf', g, dev=Cairo)
``` ...