Awesome! I got it to work on the first try. I did see that the first window mentions that the "-e" is depricated. Is there something else that should be used like "--" in front of the gnome-terminal?
Oh yeah they depreciated the "-e" for some reason in 18.04 LTS. I don't know why. I started getting this error message when I upgraded from 16.04. It will still work, but might not work on future versions of Ubuntu (18.04 is supported for 10 years). The current manual still shows the "-e" option but doesn't give any alternative, other than "--command=", which is also depreciated. What the error message suggests does not work and it doesn't work without the "-e". I assume this is a bug in gnome-terminal that will be fixed or an alternative solution will be found if and when they actually remove it.