LUA is running crazy and Hearthlings don't do anything

Hello there,
I just bought the game and played it for a few hours (it’s awsome by the way :smile: ). But since a few minutes the lua is running crazy and is ALWAYS over 98%. Forthermore the Hearthlings stopped doing anything and they just walk and stand around… This makes this beautiful game unplayable for me.
I also got 8 errors.
Mostly th/services/server/build/scaffolding_builder_ld.luac:29: assertion failed!
and c++ exception: lua runtime error.
I don’t have large mines or big buildings.

BUMP!!! I have the same problem