I can't really explain this bug, but when you try to place electric poles with blue prints they sometimes appear in different locations than they are planned in the blue print.
This also leads to objects near to electric poles not being placed if they are near an electric pole.

In 0.12 and below it was possible to do offline LAN multiplayer. With 0.13 it is no longer possible since the client and the server try to connect to some online server, even though when the server is set to LAN only.

I have had the same error and it worked for me when allowing MP Commands. =)
I haven't tried playing a MP round with a save I used in SP before but loading the save only works with commands enabled.