UE4 crashes when saving level. Crash reporter says: "EXCEPTION_INT_DIVIDE_BY_ZERO"

Hi
I have a landscape project in 4.26.1
When I want to save my level, unreal crashes.
Can anyone help me on how to fix whatever is causing the crash?
The crash reporter says:

LoginId:381e82ca405315a98f82f191fe0e7156
EpicAccountId:9f2b9bad1ab24baba6cabf8bca6e86bc

Unhandled Exception: EXCEPTION_INT_DIVIDE_BY_ZERO

UE4Editor_Core
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_LevelEditor
UE4Editor_LevelEditor
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
user32
user32
UE4Editor_ApplicationCore
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll