How to fix these buges?

after I open game
There bug are pop up on screen

release-489 (x64)
stonehearth/call_handlers/entities_call_handler.luac:5: assertion failed!
stack traceback:
	[C]: ?
	[C]: in function 'assert'
	stonehearth/call_handlers/entities_call_handler.luac:5: in function <stonehearth/call_handlers/entities_call_handler.luac:5>
release-489 (x64)
c++ exception: lua runtime error
stack traceback:

What do they mean and how can I fix it?

Welcome !
When exactly did this bug occur ?

Welcome to the forum, @haruethai
Is this happening when you start a new game or when you load a savefile?

when I load a save file @Relyss

How many HL do you have ?