Xcode storyboard: Internal error. Please file a bug
I faced the same issue. And it was solved by cleaning up the build files.
cmd + shift + k
AND
cmd + option + shift + k
Hope this helpsThanks.
The following steps will stop your problem.
- cmd + shift + k
- cmd + option + shift + k
- Restart Xcode
- Restart Mac.
Clearing out the DerivedData folder (in ~/Library/Developer/Xcode/DerivedData) is what fixed the issue for me.