Strange SIBABRT error

I started receiving the below error when attempting to run an application I was developing on iPhone:

Couldn't register your app details with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Program received signal: “SIGABRT”.

Solution

I tried a lot of things to solve this before stumbling onto the solution (in this case) of restarting the iPhone.