'Shiny app downloads kable in Rstudio cloud but not locally

I have a strange issue. The app below works normally and downloads the kable() as pdf when running in Rstudio cloud but does not download something when running locally in browser mode.

library(shiny)
library(knitr)
library(kableExtra)

options(knitr.table.format = "latex") # not required in newer versions of kableExtra

server <- function(input, output) {
  
  # Fill in the spot we created for a plot
  
  output$export = downloadHandler(
    filename = function() {"sampleTable.pdf"},
    content = function(file) {
      x <- kable(head(iris), format = "latex", caption = "Title of the table")
      
      save_kable(x, file)
    },
    contentType = 'application/pdf'
  )
  
}

ui <- fluidPage(    
  
  # Give the page a title
  titlePanel("Telephones by region"),
  
  # Generate a row with a sidebar
  sidebarLayout(      
    
    # Define the sidebar with one input
    sidebarPanel(
       
      shiny::downloadButton("export", "Export")
    ),
    
    # Create a spot for the barplot
    mainPanel(
    )
    
  )
)

shinyApp(ui = ui, server = server)

the sessionInfo of my pc

sessionInfo()
R version 4.1.2 (2021-11-01)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19043)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United States.1252    
system code page: 65001

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] knitr_1.37            kableExtra_1.3.4

compared to Rstudio cloud

R version 4.0.5 (2021-03-31)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 20.04.4 LTS

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/atlas/libblas.so.3.10.3
LAPACK: /usr/lib/x86_64-linux-gnu/atlas/liblapack.so.3.10.3

locale:
 [1] LC_CTYPE=C.UTF-8       LC_NUMERIC=C           LC_TIME=C.UTF-8        LC_COLLATE=C.UTF-8    
 [5] LC_MONETARY=C.UTF-8    LC_MESSAGES=C.UTF-8    LC_PAPER=C.UTF-8       LC_NAME=C             
 [9] LC_ADDRESS=C           LC_TELEPHONE=C         LC_MEASUREMENT=C.UTF-8 LC_IDENTIFICATION=C   

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] kableExtra_1.3.4 knitr_1.37       shiny_1.7.1

r shiny kableextra

Sources

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'Shiny app downloads kable in Rstudio cloud but not locally

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