App suddenly will not run on device

I have been running an app on my ipod that I've been developing for a while now and all of a sudden it won't run. I haven't changed xcode or macos; I've deleted the derived data folder; I've restarted the device, computer and xcode and cleaned.

The error I'm getting is: "could not start debugserver on MyDevice when trying to launch My.app"

My provisioning profile and device are green. I can't understand what I could possibly have changed.

Any ideas?

Thanks.

Why is my app suddenly stopped working?

Sometimes, the accumulated cache data of an app can cause it to stop working. When such a thing happens, you need to reset the cache data from the device settings. So, if individual Android apps are not working on your phone, another solution to fix it is by clearing the app's cached data.

Restart Xcode and the device and you should be fine.