Temp files automatically deleted in R shiny app - Error in file: cannot open the connection

Question

I created a R shiny app that automatically runs every day using a batch file. Everything works fine when lauching the app, but the next day it crashes and I get the following message:

Warning in file(open = "w+") :
  cannot open file
'C:\Users\bertin\AppData\Local\Temp\RtmpKiBPOU\Rf3f835d1a66' : No such file or directory
Warning: Error in file: cannot open the connection
  [No stack trace available]

Actually this issue is related to the tempdir() folder created by the R session executing the shiny app. This folder is automatically deleted after a certain time. Do I have to delete all Temp files on each refreshing? Or on the contrary is it needed to prevent R from deleting all shiny temp files on Temp folder? Thanks!

---

Edit - Here is how to intentionally generate the error:

tempdir()
dir.exists(tempdir())

library(shiny)

# Windows shell required
shinyApp(
    ui = fluidPage("Please reload to see me fail."),
    server = function(input, output) {
        shell(paste("rmdir", dQuote(
            normalizePath(tempdir(), winslash = "/", mustWork = FALSE), q = FALSE
        ), "/s /q"))
    }
)

Answer 1

By now I've found a setting in Windows 10 (Storage Sense) concerning the deletion of temporary files, which seems to be active by default.

Navigate as follows and uncheck:

1. Settings
2. System Storage
3. Storage Sense
4. Change how we free up space automatically
5. Delete temporary files that my apps aren't using