Also, realised I was also being misleading.
The default command foreman generates eventually runs fine.
I only tried to enable the rest of the smartproxy plugins I already have running on Foreman because I ran into this bug:
It automatically selected one organization + 2 locations that I couldn’t modify.
And now that I’ve looked at the repo file properly I can see you’ve disabled the check, which I believe gets disabled if you don’t specify a GPG key on Foreman?