Error: Running LUA method 'update'... bad argument #1 to 'remove' (table expected, got nil)

[ph1go]

I created a course to harvest a field (a combination of 68 and 69 on Elmscreek), the combine goes straight past the start point without unfolding, goes in a straight line for about a hundred yards and then stops, saying it's blocked by an object.

Log here: https://pastebin.com/raw/1vFtU7W5

Screenshots:

[pvaiko]

Duplicate of #41 and #35.