In the attached savegame - for me - the workers dont do alot, it might be that theres to much to pick up in the world however its mostly because they never picked up alot. If u leave it on long anough they sometimes build a
little part of the building, sometimes they work or do other stuff, but most of the time they are iddle.
I have no errors in the game so i dont know whats going on
Your computer doesn’t have enough processing power to calculate your hearthling’s actions in a reasonable amount of time. Until the devs streamline this process, just pause the game until that colorful bar becomes mostly green. Then all hearthlings should get back to working.