Screenshots will work as well, it's fine.
The issue seems to be an extension issue from the iTunes Store (from what the identifier is saying). It's not something that you can coherently fix without possibly boot looping yourself because you'd most likely have to recompile the app with the changes to ensure that it's working.
If you're not looking to purchase any IAPs any time soon or at all, you can attempt to disable the iTunesStore daemon and see if that resolves the issue. Disabling it would disable the ability to purchase IAPs while you've disabled it, but if you want to re-enable it, you can reverse the disabling process. It sounds a bit complicated but it's just changing the extension of a file or adding to the extension so that iOS cannot read the daemon because of an unsupported extension. It won't brick your device at all. If you're interested in it, I'll find the exact location of the iTunesStored launch daemon and we can proceed from there.
What you'll need to do before hand if you're opting to dive into this is to either have iFile and/or afc2add installed via Cydia so we can modify the rootfs where the daemons are located. Also backup your device just in case as modifying rootfs always has its risk of possible boot looping (which can be circumvented by booting into No Substrate Mode in the case of launch daemons)