I am new to quanteda and I have tried to get the Flesch’s Reading Ease Score readability index. I have 2 issues.

1. I run “library(quanteda.textstats)” but I get the following messeges. Will it cause any problem to my output?

Error: package or namespace load failed for ‘quanteda.textstats’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
namespace ‘quanteda’ 3.3.1 is already loaded, but >= 4.0.0 is required
In addition: Warning message:
package ‘quanteda.textstats’ was built under R version 4.3.3

2. After that, when I run the following codes on a set of individual PDF documents that saved in a subdirectory in my laptop.

rtext <- readtext::readtext("directory address/*")

quanteda::corpus((rtext[["text"]]))

textstat_readability(
  rtext,
  measure = "Flesch",
  remove_hyphens = TRUE,
  min_sentence_length = 1,
  max_sentence_length = 10000,
  intermediate = FALSE,
  ...
)

I get the this messege: Error: ‘…’ used in an incorrect context

Do the messeges I got are related? Any idea how can I do the readability analysis properly using quanteda?