Solution:

• In the left-hand sidebar, right click Package Dependencies -> Resolve Package Versions
  

Solution

1. Navigate to the settings: Xcode -> Settings
2. Go to the Locations tab and click the small arrow under Derived Data:
3. A Finder window appears. Delete everything in this folder.
4. Resolve Package Dependencies if needed
5. Under the Product tab -> Clean Build Folder
   
6. Attempt to rebuild