I though of reporting this here
This server issue could be raising a new (old?) bug:
If a package failed to get installed (file not found/404), then Openpli assumes it successfully installed, and therefor you can't reinstall it again from the plugin-menu (because, the plugin is now despaired). Also, you can not uninstall it from the plugin-menu to correct this, because it's not there as well.
Hopefully you guys get things sorted out.
Keep up the great work you are doing.