In the Tutorial Messages about Trains, you can do some quick training.
However whenever I try to start one of those Sections, I get an Error:
Error while applying migration: Belt Balancer (Improved Performance):
2020-03-10_Belt-balancer_2.1.1.lua
bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
""/2020-03-10_Belt-balancer_2.1.1.lua:1: in main chunk