Engine crashes on "Create Static Mesh" from procedural

Hello guys,

I’ve made some fast, simple procedural mesh in an actor blueprint (made it it’s root), and wanted to save it as a static mesh for future use - so I placed the actor into level, selected it, chose ProceduralMesh (Inherited) and there Create StaticMesh button. After pressing OK tho, the engine is crashing with unhandled exception:

Unhandled exception

UE4Editor_ProceduralMeshComponentEditor
UE4Editor_ProceduralMeshComponentEditor
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

Is there something wrong with my approach, or is this feature bugged in 4.22.3?

It looks like I “fixed” or bypassed this issue - setting materials made it work.