Error in vignette_Example (4): French MPs on Twitter

[jamesbangbang1126]

when I run :
ggnet2(net, color = "party", palette = y, alpha = 0.75, size = 4, edge.alpha = 0.5)

Error in geom_point():
! Problem while converting geom to grob.
ℹ Error occurred in the 2nd layer.
Caused by error:
! Unknown colour name: UMP
Backtrace:

1. base (local) <fn>(x)
2. ggplot2:::print.ggplot(x)
3. ggplot2:::ggplot_gtable.ggplot_built(data)
4. ggplot2:::by_layer(...)
5. ggplot2 (local) f(l = layers[[i]], d = data[[i]])
   ...
6. self$draw_panel(data, panel_params, coord, na.rm = FALSE)
7. ggplot2 (local) draw_panel(..., self = self)
8. scales::alpha(coords$colour, coords$alpha)
9. farver::decode_colour(colour, alpha = TRUE)
10. farver:::decode_c(...)