Why do I get Error when calling library (rdd) in R : - I installed rdd package, when calling library(rdd) get error message "Loading required package: AER
Error: package ‘car’ required by ‘AER’ could not be found" 
I have used functions from car (like anova) so I know I have it

I have MAC OS 10.15.1, R 3.6.1 , I reinstalled R and R studio

Install.packages("rdd")
library(rdd)

"Loading required package: AER
Error: package ‘car’ required by ‘AER’ could not be found"