I`m not sure if its a problem with blender or with the file but im just adding it here in case its a bug

https://www.youtube.com/watch?v=qbmSgi_UtTc&feature=youtu.be

Thanks for the report! Could you send the Asset Forge .model file to bugs@kenney.nl for further investigation? Also let me know which version of Asset Forge you are using. Thanks!

Never mind, I created 3 models like this one without closing asset forge 2.1 and they all crashed with blender, then I closed asset forge reopen it and recreated them and now they work fine, weird but it works :)