Error downloading the package

I cannot download the package, even though I have tried rebuiding the local package 
Installing package into ‘/Users/mac/Library/R/arm64/4.3/library’
(as ‘lib’ is unspecified)
Error in download.file(url, destfile, mode = "wb") : 
  could not find function "download.file"
Calls: download_chelsa
Execution halted