I tried to install the plugins and it did not work. They are visible in the Settings tab.
ButitisnotavailableinthePlug-instab.Ievenclickedtobefoundalphabetically.
I tried to find it through the search, but I could not.
I installed everything that was in the Android SDK Manager .
IfIgonextaddthe link address to install the plugins as you are reporting on the site below ..
.. it will generate this error.
It's not a firewall problem.
Someone can tell me what went wrong.