same here with xcode 15 and Firebase 10.15
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I fixed by during as follows:
Go to settings
Select Privacy & Security
Turn developer mode off if on
Turn developer mode back on an follow instrctions
The run your app on xcode.
This is a temporary fix. Periodical the problem may reoccur then repeat steps 1-5.
It works for me without fail. I alway clean build folder beflore during the steps.
Good luck!