[R] Read shp file

[Medic]

Help me. pls, to read .shp file.

`library("tmaptools")
geo <- read_shape("Rom.shp", as.sf = TRUE)
This function is deprecated and has been migrated to
github.com/mtennekes/oldtmaptools`

I have to turn to another function, but I get an unclear message

`library(raster)
geo <- shapefile ("Rus.shp")
Error in .local(x, ...) : file.exists(extension(x, ".shx")) is not TRUE`