Can't add a new anim notify

I’m clicking ‘New Notify’
The window that should show up to name your notify never appears.
Nothing happens.

I’m on macOS.

217978-screen-shot-2017-10-26-at-95800-am.png

I was able to recreate the bug in a new third person project.

Weird work around solution:

I was trying to make a screen capture of the issue so I could share it and when you use that the screen refocuses and you can add a notify.

This is obviously not a great solution but it will have to do for now. Hopefully epic will make this work again like before soon.