Modeling Simpify Tool

Unreal 5.2, Modeling > Simpify Tool. Each time I use this function the engine stop responds.
In task manager, (CPU ~0%; memory ~ 10%) for this application, and nothing done in the unreal engine.
Can someone help to solve this issue, or explain what is going on.
My machine i7, 3070Ti. 32GB memory.

how long do you wait for? when i get engine doing same usually it goes back responding again, unless it says Not responding, then i kill it