Why do I get this error using biomod2:response.plot2, and is it important? Error in ncol(dat_) : could not find function "ncol"

Question

When I run the example for the response.plot2 function (biomod2 package) I get the above error. The code produces some plots but does not save an object

Here's the example (including the code that I ran): https://www.rdocumentation.org/packages/biomod2/versions/3.3-7.1/topics/response.plot2 )

[edit:] The source code for the function response.plot2 is here: https://r-forge.r-project.org/scm/viewvc.php/checkout/pkg/biomod2/R/response.plot.R?revision=728&root=biomod

It includes these lines:

.as.ggdat.1D <-
  function (rp.dat) 
  {
    # requireNamespace('dplyr')
    out_ <- bind_rows(lapply(rp.dat, function(dat_) {
      dat_$id <- rownames(dat_)
      id.col.id <- which(colnames(dat_) == "id")
      expl.dat_ <- dat_ %>% dplyr::select(1, id.col.id) %>% 
        tidyr::gather("expl.name", "expl.val", 1)
      pred.dat_ <- dat_ %>% dplyr::select(-1, id.col.id) %>% 
        tidyr::gather("pred.name", "pred.val", (1:(ncol(dat_)-2)))
      out.dat_ <- dplyr::full_join(expl.dat_, pred.dat_)
      out.dat_$expl.name <- as.character(out.dat_$expl.name)
      out.dat_$pred.name <- as.character(out.dat_$pred.name)
      return(out.dat_)
    }))
    out_$expl.name <- factor(out_$expl.name, levels = unique(out_$expl.name))
    return(out_)
  }

I tried changing ncol(dat_) to base::ncol(dat_) and then running the whole lot to redefine the function response.plot2 for my R session, but I got a different error message:

Error in base::ncol : could not find function "::"