I'm trying to upload a release to Fabric & I'm getting errors as follows. I'm using the XCode 6.3 (recently updated).
Mike from Fabric here.
1) To clear that error from Fabric.app: Quit Fabric.app, then run this command to clear the local cache:
rm -rf ~/Library/Caches/com.crashlytics.mac
(You may also need to clear
rm -rf ~/Library/Caches/com.crashlytics,
rm -rf ~/Library/Caches/com.crashlytics.data and
rm -rf ~/Library/Caches/com.crashlytics.run)
Then restart Fabric.app and you'll be all set!
2) To distribute outside of Fabric.app, use either method mentioned here.