Hi there!
I've been working on a map for a while (big: 40k) and every time I click test it crashes the entire game! I had used some collision boxes which made it so that I could only use test once per session (with subsequent tests causing the whole client to crash) but now it just crashes each time. Map maker loads fine!
EDIT: I tried moving my_objects, terrains, textures, the map, etc. into a new version and that didn't fix it. Then I tried to remove the collisions and that did not work either.