I used the following code to install the tabulizer package:
tabulizer
ghit::install_github(c(\"ropenscilabs/tabulizerjars\", \"ropenscilabs/tabulizer\"),
Try this...
library(devtools) install_github("ropensci/tabulizer", dependencies = "FALSE")
you want to install the other packages that tabulizer uses one by one as well i.e. rJava, httpuv, sourcetools, png