i also have that same problem even if allowed to design it is not allowing up to plow new plots. my bulldozer doesnt work on his farm either. if it matters my plow does show up in my tool box it just wont plow
i am also not able to get into store or my SN storage to get items to design with.
my crane doesn't work on his farm either so i can clear it off so can do the work my SN wants my help with
am we missing a step? he approved to do all of the options that poped up as choices when he SN me...