Installation Failed: Invalid Argument -iOS Extension

Question

https://imgur.com/vFn0S7g

I am about to build watch app target from existing project. I encountered a strange error upon finishing build that unables me to run the wa

Answer 1

I got it working after I tried everything mentioned here, then deleting the app from the device and restarting XCode. Those two steps were mentioned here: https://stackoverflow.com/a/28232381/1586277

I have no idea what combination of steps fixed it though.