I tried running a preview of my game today, and it was black. I tried saving my game, closing Gdevelop, and then opening it again, but it was still black. I only make very minor point related changes before I first ran the preview, and that was just for the events of a single scene. I tried toggling them and playing a different scene, but it was still black.
Don’t know if this could maybe be related to the newest update, as I was notified of a new update when I opened Gdevelop.