You can use the 18.04(.1) alternate server installer if you run into this situation. Also, I think this situation has improved in the 18.04.1 'server-live' (subiquity) installer.
You can use the 18.04(.1) alternate server installer if you run into this situation. Also, I think this situation has improved in the 18.04.1 'server-live' (subiquity) installer.