Client exited with error code:27

Hi,everyone.
I try to play my game on my Iphone xr. At the end of packaging,i always got this issue.But the game could work on my Iphone.How can i eliminate this error?

LogPlayLevel: Took 5.524585s to run mono, ExitCode=0
LogPlayLevel:
********** DEPLOY COMMAND COMPLETED *******
LogPlayLevel:
********** RUN COMMAND STARTED **********
LogPlayLevel: Starting Client…
LogPlayLevel: Running:
/usr/bin/env /usr/bin/xcrun xctrace record
_-device ‘00008020-001B58641104402E’
–template
"Activity Monitor’
_-output
LogPlayLevel: No devices found matching 00008020-001B58641104402E
LogPlaytevel: Deleting, /Users (vangruanl:/(documents (unreal. Projects/lyProject2/Saved/Stagedfuilds/105/ aunch. trace
Co LogPlayLevel:
LogPlayLevel:
(see /Users/wangxuanli/Library/Logs/Unreal Engine/LocalBuildLogs/Log. txt for full exception trace)
AutomationTool exiting with ExitCode=1 (Error _Unknown)
LogPlayLevel: Completed Launch On Stage: Build Task, Time: 128.368382
LogPlavLevel: Error: RunUAT ERROR: AutomationTool was unable to run successfullv
PackagingResults: Error: Launch failed! Unknown Error