SqueakMap无法在新的3.10开发图像中使用

I just downloaded a fresh Squeak-dev image from Damien Cassou, clicked on SqueakMap, and got the error that in SqueakMap>>categories, the objects instance variable is nil, but shouldn't be. I can't be the only one with that error, am I? What should I do?I just downloaded a fresh Squeak-dev image from