Swift Sdtlib tool error: Task failed with exit code 1

Question

So randomly after several hours of work this morning on my app, Xcode just stopped letting me test my app on my iPhone. But I can still test it in the simulator.

Now

Answer 1

Ok so I solved this, don't know if it's the right way or not.

Moved my iOS developer certificate from local to system using Key Chain.

Steps:

1. Close Xcode.
2. Open Key Chain.
3. Find the iOS Developer cert in Local.
4. Drag and drop the cert from Local to the System tab.
5. Enter admin password when prompted.
6. Start Xcode and build project for your device.