iOS build fails to launch: IDEDebugSessionErrorDomain Code 3

I am unsure where to go from here. My app has zero UI, but will use the microphone from a native plugin, eventually. If I comment out the calls to initialized the native code, it doesn't prevent me from seeing this in XCode:

Details

Could not launch “MyApp”
Domain: IDEDebugSessionErrorDomain
Code: 3

Failure Reason: John’s phone has denied the launch request.
Internal launch error: process launch failed: Unspecified
--
process launch failed: Unspecified
Domain: IDEDebugSessionErrorDomain
Code: 3
​

I don't know how to acquire any additional detail into the failure. I have tried making development/non-development builds and a few other variations. Nothing helps.

Ideas? Android was drop-dead simple, by comparison.

edit: this came down to needing a new cert Apple had issued: https://developer.apple.com/forums/thread/662300

Tony