An iOS app with embedded Citrix MDX toolkit crashes with "unable to obtain bundle for localization" error

I have an iOS app written in Swift 4.x running on iOS 11.x that crashes into an (not from me coded) alert that says three times "Warning: Unable to obtain bundle for localization" if it is deployed and started by Xcode to an actual device.

I embedded the MDX / Worx frameworks
I installed the Citrix Secure Hub App from the App Store

Prior the embedding the app ran smoothly without any problems. I was not able to find any resources from Citrix's support pages.

Does anybody have an idea or an "point of start to debug" for me?

Solution

Late, but I had same problem and found solution. In MDXToolkit/data folder there is CitrixDylib.bundle file. It needs to be attached to XCode project (simple drag&drop).

Then finally it's possible to see what's wrong:

Here is screenshot before localization bundle with "Warning: Unable to obtain bundle for localization" message,

Here is screenshot after localization bundle with proper message: App Not Available: The account for this app has been removed from Secure Hub. Please remove this app from your iPhone and reinstall it in Secure Hub.

So if I understand correctly, app exits because is sideloaded, not installed through Secure Hub.