Finder not displaying a folder icon. How do I get it back? In the screenshot above, my Real Estate folder on the right (a dropbox folder) isn't showing the littel blue folder icon. It isn't affecting anything functionally yet it just drives me crazy every time I see it. Is there a way to get it to show?
I found some useful info on this Apple support discussion:


  First verify from Finder>View>Show View Option>Show icon Preview
  
  
  
  If that is check, toggle it off and on.
  
  If no success
  
  
  Open to the Preferences folder of  your home directory, or from  Finder>Go>Go to Folder, copy &amp;  paste: ~/Library/Preferences/
  com.apple.finder.plist
  Delete the com.apple.finder.plist
  From the Finder icon on the  Dock, hold the control option key  and click the Finder icon>select 
  Relaunch.
  


If that doesn’t work try updating our Dropbox.

I found someone with a similar problem online:


  I contacted support via chat, and they helped me understand that the dropbox version was outdated. now updated and it's working. thanks!



https://www.dropboxforum.com/t5/Installation-and-desktop-app/MacOs-High-Sierra-10-13-6-after-update-icons-missing-in-finder/m-p/319945#M58452