18.04 Cannot disconnect from wifi network (eduroam)

I have set up my linux laptop to use the infamous and astoundingly bad eduroam network, using their CAT software (it’s a python script).

Now I can’t connect to other wifi networks or even disconnect from this network whenever it is available.

I click on connect, and nothing happens. There is no button to disconnect from the network.

I tried removing the file in /etc/NetworkManager/system-connections as explained here. It still won’t forget the network.

Any suggestions?

sudo service network-manager restart