Looks like an error in Lift01 script, lines 164, 199...etc
Is:
move_mode +=..... + .....
should be:
move_mode =..... + ......

And what is ignore_world? Search in help (in sed) "move_mode".
Check Your lift01.wdl in template folder and search those lines.
Remove "+" and "ignore_world".

I've downloaded this demo, build, run and everything is OK, but in my lift01.wdl I haven't such a bugs

Hope that will help.