@SpaceMan, whats the solution, I'm getting same issue
Xcode Log Error:
Warning: Error creating LLDB target at path '/Users/XXXXX/Library/Developer/Xcode/DerivedData/VM-ahksdstzldqcwielhvihoeabkyqy/Build/Products/Release-watchsimulator/KWatchOS2.app'- using an empty LLDB target which can cause slow memory reads from remote devices.
skipping /Applications/Xcode12.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/dyld_sim
2021-04-19 16:40:36.632492+0530 KWatchOS2 Extension[4857:50926] [default] lookupMainFuncAddressInMachHeader:71: Invalid Swift entry point data
2021-04-19 16:40:36.633521+0530 KWatchOS2 Extension[4857:50926] [default] lookupMainFuncAddressInMachHeader:77: Swift entry point addres could not be determined.
Xcode Running Error Details:
Error Launching 'KWatchOS2.app'
Domain: IDELaunchErrorDomain
Code: 16
Failure Reason: DTServiceHub Watch Control Channel init failure for: com.XXXX.WatchDemo.watchkitapp-
DTServiceHub Watch Control Channel init failure for: com.XXXX.WatchDemo.watchkitapp
Domain: DVTDeviceErrorDomain
Code: -1-
System Information
macOS Version 10.15.7 (Build 19H524)
Xcode 12.2 (17535) (Build 12B45b)