Ionic emulate ios crashes

I’m using ionic CLI 1.2.8 to emulate on ios, while that work before, now I’m getting the following crash and no emulator is started:

2014-10-24 10:23:58.110 ios-sim[54581:507] *** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[__NSArrayM localizedDescription]: unrecognized selector sent to instance 0x7ff739c03070’
*** First throw call stack:
(
0 CoreFoundation 0x00007fff974e925c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff97623e75 objc_exception_throw + 43
2 CoreFoundation 0x00007fff974ec12d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00007fff97447272 forwarding + 1010
4 CoreFoundation 0x00007fff97446df8 _CF_forwarding_prep_0 + 120
5 ios-sim 0x0000000104292e29 -[iPhoneSimulator LoadSimulatorFramework:] + 245
6 ios-sim 0x00000001042948e0 -[iPhoneSimulator runWithArgc:argv:] + 2271
7 ios-sim 0x0000000104294cb2 main + 101
8 ios-sim 0x0000000104292ce4 start + 52
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Any ideas on making this more stable or run at all again?