Xcode 7 - Cannot open document (storyboard file)

I recently updated to Xcode 7 and as usual something has to go wrong. Its really a shame because I was looking forward to the new features in Xcode 7.

I am faced with a an error which I cannot seem to fix. Every time I try and build the project I get the following error:

I thought there was something wrong with my project, so I made a new Single View application and I still get the same error.

I have tried the following things but none of them has worked for me:

Restart Xcode (Didn't work).
Clean and rebuild project (Didn't work).
Restart Mac (Didn't work).
Reinstall Xcode 7 from the Mac App Store (Didn't work).
Installed Xcode 7 on a different Mac (Still got the same issue, even with a new Xcode project).
I tried the solution in this Stack Overflow question: https://stackoverflow.com/a/31614717/1598906 - But alas it did not work.
Finally, I tried the following Terminal command with no avail: $ sudo killall -9 ibtoold

Is anyone else having this issue with Xcode 7.0? And if so, have you managed to come with any other solutions? I have tried everything I can think of and nothing works.

Lastly, below is a copy of the error Log:

2015-09-18 21:09:28.416 ibtoold[1598:39510] [MT] IBPlatformTool: *** Failed to launch tool with description System content 1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity: Failed to find or create execution context for description System content 1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity: Failed to find a suitable device for the type SimDeviceType : com.apple.dt.Xcode.IBSimDeviceType.iPad-1x with runtime SimRuntime : 9.0 (13A340) - com.apple.CoreSimulator.SimRuntime.iOS-9-0 (Failure reason: Failed to create SimDeviceSet at path /Users/daniel/Library/Developer/Xcode/UserData/IB Support/Simulator Devices. You'll want to check the logs in ~/Library/Logs/CoreSimulator to see why creating the SimDeviceSet failed.) 2015-09-18 21:09:38.290 ibtoold[1598:39510] [MT] IBPlatformTool: Wrote failed marshalling request diagnostics to path: /var/folders/lx/kkhv57fd2ll7rhdt0bwfpkb00000gn/T/IB-agent-diagnostics_2015-09-18_21-09-28_418000 /* com.apple.ibtool.errors */ /Users/daniel/Desktop/DS APPS/BT/BloodyTest/BloodyTest/Base.lproj/LaunchScreen.storyboard: error: Could not open document Recovery Suggestion: Failed to connect with the iOS agent. Please file a bug report at bugreport.apple.com and attach a zip file of the diagnostics located at "/var/folders/lx/kkhv57fd2ll7rhdt0bwfpkb00000gn/T/IB-agent-diagnostics_2015-09-18_21-09-28_418000". Underlying Errors: Description: Failed to find or create execution context for description System content 1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity Underlying Errors: Description: Failed to find a suitable device for the type SimDeviceType : com.apple.dt.Xcode.IBSimDeviceType.iPad-1x with runtime SimRuntime : 9.0 (13A340) - com.apple.CoreSimulator.SimRuntime.iOS-9-0 Failure Reason: Failed to create SimDeviceSet at path /Users/daniel/Library/Developer/Xcode/UserData/IB Support/Simulator Devices. You'll want to check the logs in ~/Library/Logs/CoreSimulator to see why creating the SimDeviceSet failed.

Thanks for your time, Dan.

Well thanks to the community for all there help..... not.

In the end I got it working by simply upgrading to OS X El Capitan and Xcode 7.0.1.

One thing I would point out though, is that when I was looking through the Xcode app files, some of them were corrupted and when I updated to Xcode 7.0.1 this issue was not fixed. So before installing OS X El Capitan, I deleted the following: