It's to do with the texture streaming. Unreal requires a certain amount of graphics card memory to load textures and I'm guessing you just don't have what it needs. There are ways to optimize that better as a developer, I'm sure. I just didn't take have the time to really dive into it for this since it was for a relatively short game jam. But I kind of suspected that might be a problem for some players, tbh. It's a very texture heavy game and we didn't do a whole lot of optimizing the images we used due to time constraints.
Can I ask what graphics card you have? If you know.
Sorry your experience wasn't ideal. Maybe I'll look into fixing that and if it's not too much work I'll update it.