Error in geom_lollipopcolour = darkblue size = 2 pointcolour = red could not find function geom_lollipop

The error message suggests that the function geom_lollipop() could not be found. This function may not be part of the loaded packages. Try loading the package that contains the geom_lollipop() function using the library() function, or if the function is not available in any package, install the package that contains the function using the install.packages() function.