Problem downloading pcalg library/package

On Thu, 24 Mar 2022 14:00:35 +0000 (UTC)

'Peer certificate cannot be authenticated with given CA certificates'

This error message is an important clue, but I'm not sure where it
leads. It could indicate a problem with your system or your R
installation.

Try asking at R-SIG-Mac <r-sig-mac at r-project.org>. Meanwhile, try
setting different values for options(download.file.method = ...) before
attempting package installation. Perhaps one of the available options,
which include "internal", "libcurl", "wget", "curl", would work.

Best regards,
Ivan