plugins can't download

hey i tried to get some economy plugins for my server but when i tried to download https://aternos.org/addons/a/bukkit/chestshop it started downloading and then showed a check mark but after like 1 second it disapeard again and the plugin did't end up in the files pls help

i tried diffrent plugins and no one works

is there a max limit to plugins?

this is a problem to