/!\ Call load or importOrLoad before routing /!\

Hello, my iOS (objective-c) app crashes when I launch the calculation of an itinerary. Please see the Xcode crash report below:

This happens in the current version after having updated to Xcode 9 and swift 4 (I do not know if this is related, iOS 11 maybe?).

The strange thing is that when I run the application from my mac, the problem does not exist, this only happens when I use it through TestFlight.

Does anyone have an idea how to solve it?

Thank you very much in advance.