Bundle identifier in the Info tab shows to read $(PRODUCT_BUNDLE_IDENTIFIER). I am not too sure where to go to find the DerivedData folder, I usually just use an app called DevCleaner for that. What's weird is it's JUST the Xcode canvas previews that are causing the issue. Testflight builds, simulator builds, real device builds - all fine.
If the Xcode install was invalid, would this issue be effecting all projects - not just this one single project?