After update my Rgui to 4.2.1 version I found an enconding issue which was apparently solved by Problem with opening scripts in updated version of R. Briefly: my R files were opening empty and the solution was simply change default encoding to UTF-8.
But other issue came with (or just was there from the beginning). When I tried to read some xlsx directly from url, I got this error message:
In download.file(url = xlsxFile, destfile = tmpFile, cacheOK = FALSE, :
URL 'https://www.rug.nl/ggdc/historicaldevelopment/maddison/data/mpd2020.xlsx': Timeout of 100000 seconds was reached
When I went back to R 4.0.5, the problem disappeared!
Reproducible example
url_maddison = "https://www.rug.nl/ggdc/historicaldevelopment/maddison/data/mpd2020.xlsx"
read.xlsx(url_maddison, sheet = 3)