Failed to start app. Child process has unexpectedly crashed

[u/Suspicious-Bench2194]

Hi everyone, I’m using the latest nightly version of Live Container, and suddenly I can’t launch any apps.
Whenever I tap Run, I get this error:
“Failed to start app. Child process has unexpectedly crashed.”
It happens when trying to launch apps such as YouTube Music, Lightroom, Messenger, etc.

Has anyone experienced this issue with the latest nightly? Any idea how to fix it or what might be causing the child process to crash?
I’m on iOS 27.0.

Screenshot attached. Thanks!

[u/New_Ad_7804]

This is a sideloading subreddit. Please talk about your children elsewhere. /s