If you want to try R code while we discuss, recommend having R 3.3.2 installed with packages below.
To install all these, you should need only to
install.packages(c("leaflet", "sp", "rgdal", "tidyverse", "maptools", "rworldmap", "mapview"))but if you have problems, don't worry it's not critical. (But feel free to email the organizer/s. )
https://www.rstudio.com/products/rstudio/download/
https://support.rstudio.com/hc/en-us/articles/201141096-Getting-Started-with-R