ggarrange, combine multiple plots with ggplot

I have a list of plots (15 in total). enter image description here

I want to arrange them in a single page with a 3x5 matrix I used ggarrange with two plots enter image description here

Now i want to do it with all the plots

Moran_plot_eu_std <-ggarrange(plots=plotlist,
                              common.legend = TRUE, legend = "bottom",
                              ncol = 3, nrow = 5)

But it doesn't work or send back error message

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