Package check result: ERROR

Check: examples, Result: ERROR
  Running examples in ‘RRgeo-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: eucop_data_preparation
  > ### Title: Import and preprocess mammal occurrence data
  > ### Aliases: eucop_data_preparation
  > 
  > ### ** Examples
  > 
  > ## No test: 
  > 
  > newwd<-tempdir()
  > # newwd<-"YOUR_DIRECTORY"
  > 
  > eucop_data_preparation(input.dir=newwd, species_name="Ursus ingressus",
  +                        variables="bio",which.vars = "bio1", calibration=FALSE, combine.ages="mean",
  +                        bk_points=NULL,output.dir=newwd)
  Please cite:
            Mondanaro, A., Girardi, G., Castiglione, S., Timmermann, A., Zeller, E.,
            Venugopal, T., Serio, C., Melchionna, M., Esposito, A., Di Febbraro, M., &
            Raia, P. (2025). EutherianCoP. An integrated biotic and climate database
            for conservation paleobiology based on eutherian mammals.
            Scientific Data, 12: 6. doi:10.1038/s41597-024-04181-4.
  Error in eucop_data_preparation(input.dir = newwd, species_name = "Ursus ingressus",  : 
    The package 'rnaturalearthhires' is needed for this function to work,
   please install it using the following command:
           install.packages('rnaturalearthhires', repos = 'http://packages.ropensci.org', type = 'source')
  Execution halted