I was able to get Ubuntu MATE to finally run on my Pi 3B+ after following this tutorial: https://www.youtube.com/watch?v=tdJrd75_068&lc=z234tvgocvmqyzb5a04t1aokgml1ll00iwv1gbnt2da0rk0h00410.1542100861012450.
However, I'm still having issues making the wifi work. I am able to enable networking and edit connections, but I can't seem to actually connect to the wifi.
I have already tried the following steps to try to fix the wifi:
sudo nano /etc/NetworkManager/NetworkManger.conf
--> I changed "false" to "true."
sudo service network-manager restart sudo service NetworkManager restart sudo rfkill unblock wifi sudo reboot
Does anyone have a solution to this wifi issue?