CRAN and packages problems

The SSL certificate check for stat.ethz.ch fails. Given that it is actually valid (see below), the problem is on your end. Possible causes are

a) intermittent issue - try again or try another mirror

b) too old macOS with expired root certificates - see https://stat.ethz.ch/pipermail/r-sig-mac/2021-November/014228.html

c) bad proxy - remove the proxy or contact the proxy administrator

d) someone is messing with your network - worry

Cheers,
Simon


Certificate:
    Data:
 [...]
        Issuer: C = US, O = Let's Encrypt, CN = R3
        Validity
            Not Before: Feb 25 03:44:39 2022 GMT
            Not After : May 26 03:44:38 2022 GMT
        Subject: CN = stat.ethz.ch

On Mar 25, 2022, at 4:26 AM, varin sacha via R-SIG-Mac <r-sig-mac at r-project.org> wrote:

Dear R-experts,

Can somebody tell me what is going on ?

Here is what I get :

download.file('https://stat.ethz.ch/CRAN/src/contrib/PACKAGES','PACKAGES')

essai de l'URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES'
Erreur dans download.file("https://stat.ethz.ch/CRAN/src/contrib/PACKAGES",  :
  impossible d'ouvrir l'URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES'
De plus : Message d'avis :
Dans download.file("https://stat.ethz.ch/CRAN/src/contrib/PACKAGES",  :
  URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES': statut 'Peer certificate cannot be authenticated with given CA certificates'

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