Problem with updating color in orchaRd using ggplot

Please can someone assist me in updating the color orchard plot as my code below does not work properly. The plot is produced but the color of the points does not change.

orchaRd::bubble_plot(
BC_M1,
mod = "count",
group = "Author",
xlab = "Moderator",
ylab = "Effect size",
k = FALSE
) + scale_fill_manual(values = "blue") +
scale_colour_manual(values = "blue")

I don't know what your data looks like, but if I use the example from the bubble_plot documentation, I notice that it gives me an error if I only have one fill value value, so I need to do this:

p <- orchaRd::bubble_plot(
  model, 
  mod = "year", 
  legend.pos = "top.left", 
  #data = lim, 
  group = "Article", 
  weights = "prop", 
  by = "Environment") 


  p + scale_fill_manual(values = c("blue","blue"))