Not all plug-ins were found on the package server

No puedo instalar los plug

el mensage es este

Couldn’t find Parakeet ()
Downloading LunchBox (2016.3.21.0)…
Couldn’t find LunchBox (2016.3.21.0)

Successfully installed 0 of 2 packages.

Not all plug-ins were found on the package server.

Developers, please visit https://discourse.mcneel.com/c/serengeti/yak to find out how to add your plug-in to the package manager.

por favor ayuda

Use Food4Rhino.com instead, most plugins are not avaiable via YAK.
Parakeet: https://www.food4rhino.com/app/parakeet
LunchBox: https://provingground.io/tools/lunchbox/