ggtree not able to produce emojis in color

[sophiaaredas]

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Hello, I am having fun with ggtree and it has been great to make figures. I was really excited to learn how to make trees with emojis and I was trying to do so but I find that it is able to produce a black and white outline of the emoji, but not the colored object. I have tried rendering this in safari but I do not seem to be making any progress. I am literally copying and pasting the code and I believe that it should produce color but on my end it is not. Any help would be appreciated!!