Hi @larryb,
sudo apt-get install --no-install-recommends ubuntu-mate-core && sudo apt-get install --no-install-recommends ubuntu-mate-desktop
That should ensure you have all the right software installed. Then log into the MATE session and use MATE Tweak to switch away from, and then back to, the "Ubuntu MATE" interface. Then Enable Indicators from MATE Tweak. How that look now?
Info taken from here provided by @Wimpy:
Another alternative is the following terminal command:
sudo apt-get install mate-desktop-environment-extras
Restart after unning the above command and log in to the Mate desktop at the login window!. 