i cant seem to open matinee, or access blueprint,viewport, or anything else. it always give a blank white window.
i don’t know real reason , but I have read that difference between project versions causes this. Like if you are opening UE 4.8 version project with UE 4.9.
it was made by same version i even create a new blue print and its till the same. but it work on my older computer but i didnt use it since it was an old macbook air.
i figure it out, unreal open the window very small thaat it become invisible. to i fix it i right click on the white window and click maximize