Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger

I got this error:

Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger

Seem like even the empty app without anything I will get this error,

So I tried to fix it
1. Restart Xcode
2. Restart Computer
3. Restart your iPhone


Then i get this error

Assertion: should not be reached at tramp-arm.c:724

Finally, it turn out to be causing by Unity iPhone Simulator -> Your Device

meaning, you just need to go to the Xcode, on top left, then change it to Unity iPhone -> Your Device

then you can see it run perfectly on your iPhone

I wonder why this is not mention anywhere on the tutorial