You could indeed try to set the Timezones. I think I remember it helpd me at certain points.
Another option could be to try ro install the package via RStudio. Sometimes that also helped.
https://www.r-bloggers.com/doing-away-with-“unknown-timezone”-warnings/
options(tz=“Europe/Berlin”)
Sys.setenv(TZ=“Europe/Berlin”)
Sys.getenv(“TZ”)