let ayucolor = "mirage" launch a popup

[ebdm13]

when i write let ayucolor = "mirage" it launch "hit the enter key or enter a command"

that's my vimrc

call plug#begin()
Plug "ayu-theme/ayu-vim"
call plug#end()
set termguicolors
let ayucolor = "mirage"
colorscheme ayu

and it seems that the let ayucolor = "mirage" line throws a popup.
can someone tell me why and how to avoid it please

[Luxed]

I'm pretty sure this is a duplicate of #73.
And as instructed there, you are better off using my fork: https://github.com/luxed/ayu-vim.

[ebdm13]

Thanks