Can't import 'mice' package in R on MacOS Mojave

Question

Can install 'mice' package in R but I can't import it. Same error keeps occurring after reinstallation of R and mice package. R version : 3.5.1

Error: package or namespace load failed for ‘mice’ in readRDS(mapfile):
unknown input format

Answer 1

Often if I encounter such problems, I check, what is package address in github. Because often github accounts contain the most recent bug-fixed versions by the author.

# If not installed, do as preparation:
# install.packages("devtools")

devtools::install_github("stefvanbuuren/mice")