I got this message within Xcode, any idea how to fix it?
Xcode 7.0 beta / IOS9 / WatchOS 2 - no symbols for paired Apple Watch?
3.3k Views Asked by Ing. Ron AtThere are 3 best solutions below

The solution that worked for me is based on the earlier post, but to simplify things I’ve followed the initial steps, changed the directory name to work with Beta 5 and zipped the relevant folders. So the simplified version for Beta 5 is:
Download the zip file from here to the target directory: ~/Users/[user]/Library/Developer/Xcode
Unzip the file. You should see a new folder named “WatchOS DeviceSupport” under your Xcode folder, with another folder named “2.0 (13S5325c)”.
Open project on Xcode 7 beta.
Disconnect and connect your iPhone.
That’s all – it worked for me, I hope it will work for you as well.
I couldn't post the image, you can find the complete post here.

in case anyone is still struggling with this, i was able to solve by updating to the most recent version of xcode.
everything was working until watchos 2 beta 5 installed on my watch, then i got this error. updating to xcode 7 beta 5 allowed my watch to appropriately have the new symbols installed.
From https://forums.developer.apple.com/thread/3380: