Same issue Xcode 13.2.1 Big Sur 11.6 iPhone 11 iOS 15.4.1 Apple Watch Series 7 watchOS 8.5.1 I've done the clean, delete derived data, restart dance. Along with various hacks suggested in this thread. Nothing works. Apple Watch development was terrible 2 years ago. I hoped they would've smoothed things out by now, but it's even worse. If not at fix, can we at least get an explanation of what's going on? Given the amount of time and money we spend to work on your platform. I'm tempted to ask for a refund of my recently purchased watch. Apple is aggressively indifferent to its developer community, to the point of hostility. This is a ******* joke.

I also get this error. I'm on XCode 12.2 (I can't update it, because I need 20+ gb free space to do that for some reason, which is near impossible with my 128gb MBP). I can't think of any code change I've made which would've caused this. As a sanity check, I've commented out almost all of the UI (I was solely doing UI work when this started happening), and it's still happening. They could at least get the spelling in the error message correct. Swift entry point addres could not be determined. It really shows the level of attention they're giving to Watch development. You'd expect better from a $2T company