Why won't my Google Widget on the home screen work??

[AC Question]

Hello!

I just got a Galaxy S4, yeah, I'm behind, I don't care

Anyways, the phone didn't have the google search bar on the homepage when I first got it and I tried to add it. So now I have it on my homepage, but it will not let me press the little microphone button nor will it even let me select it at all!

Why is that?

Thanks!