Thanks for replying. The link you gave just says three times "Tap the Memoji button" which I stated in my post does nothing. I am confused how this article applies. I am not sure how to rephrase my question to be more clear. Touch the memoji button with your finger, nothing happens. It is not an error, or a blank spot, or a spot of any kind, there is nothing. Like tapping your finger on a brick. Nothing happens. Now if I tap the smiley face in the bottom left of the keyboard to see emojis, I see the memojis and tapping those also results in nothing. The regular emojis do work.
Yes, I have used memojis before on my iphone 7. When I bought my iphone 8 and set it up this is when the problem started.