Not to sure what the heck is going on. I reloaded Ubuntu-mate 18.104.22.168 last night and now it will not connect to my wifi. It sees it, but keeps saying the password is no good. At least it sees the wifi connection which is a definite step in the right direction from the earlier version.
I didn't have the issue the first time around, so I thought maybe the wifi on my Pi has screwed up. I loaded up the latest Rasbian and it says it connects to the wifi, but the ip address it comes up with is a 169 address, so I know it is not really connected. My wifi gives out 192 ip addresses.
The Pi I am trying to use is a Pi3 B. I have a Pi3 B+ in another project that I am not using at the moment, so I will pull that apart and see if that does the same thing.