Can't install plugins

Hi, i'm having trouble installing plugins. I have not had problems with this before as i have plugins installed on my server already. The plugins i'm trying to install is TAB and PerWorldServer. so i click the download it downloads and it then shows the tick but there's no update to the Files tab on my server. I've tried restarting my server and installing when the server is offline and online.

nvm ive read a post which answers my problem "It's not a problem with aternos, it's a problem with the downloads on spigotmc.org, which is preventing the plugins from working. all we can do is wait for the people at spigot to fix it."