My Map Keeps Crashing When I try to save :(

[PhyrexianDakito]

Whenever I try ot save the mnap im working on in World Editor, it crashes. This lost me a lot of imformation the first time, and I thought it was just a fluke so I tried it again arfter redoign my work and the Editor just died out on me. What am I doing wrong? Has this happened to anyone? I started after I downloaded patch 1.18, soI think that might have something to do wiht it. I have 2 imported models and a few icons but they didnt cause trouble before. My other maps save perfectly, so it seems to be just this one version.