Hover preview does not work in my Workspace...

From the get go, whichever course video it was that told about the ability in Workspace to preview a color when you hover the mouse selector over that particular code, I have not been able to get the preview box to pop up.

I thought this would be a neat little addition, and helpful, but it has just not worked in Workspace anytime for me, and I have tried different things to see if I can remedy it. I have gone through View and made sure that "Quick View on Hover" is selected. I have even "unselected" it, tried it, then selected it back and tried it, but kept getting the same result. Every time that it has failed to come up, I verified my code was typed correctly (I'll post my code snippet from main.css below just in case anyone might see I am missing something.

So, I am curious if anyone else has this issue at all, and if maybe this feature has been removed in some sort of update to the Workspace. Not having this feature working properly so far has not impacted anything or prevented me from doing anything in the course. I just like to have things working properly and I think that this is a very useful feature.

a {
  text-decoration: none;
}

#wrapper {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 5%;
}

#logo {
  text-align: center;
  margin: 0;
}

a {
  color: #6ab47b;
}