Ticket tracking library was not loaded in time - does not work on ios 7

I am trying to run the zombie tool using the ios 7.1 simulator, but I get the error "The distribution tracking library was not loaded in time". When I try to run zombies with ios 8.3 simulator it works. I am working with xcode 6.3.1 and zombie is included in Scheme. Does anyone know what the problem might be?