[R] Problem to install rattle Library on RStudio Version 0.99.486

[Mateus Coelho]

Although I already tried to install this package at my RStudio, I can't manage to do it. Would you have any hint to help me solving this problem.
Thanks and greetings Mateus Coelho Silva
br.linkedin.com/in/mateuscoelhos
(Tel/WApp: +55 31 88535135)
-Graduando em Engenharia de Controle e Automação - UFMG
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