import kml file into R

I'm new to the spatial side of R and trying to import a kmz file from Google Earth. I opened the file in Google Earth and saved it as a kml file.

However, in R, I get the following error:

land <- readOGR("shape files/FGPcanada_landcover_2015_en.kml")
Error in ogrListLayers(dsn = dsn) : Cannot open data source