"Open Level" only works in Editor - Not in Standalone or packaged game

Didn’t work for me. I did everything in this thread and more, and still have no idea why my maps won’t load. I’m actually quite impressed that I’m having this issue with Unreal. I’m on 5.1, but I’ve tried other versions without luck.
I’ve even added the build data from my maps, but still, it just reloads the same map when I walk into the collider, or if I try to change map via console. This is absurd.