hi! how do i reserve an app name?

i also get the same error when i run on real iphone through xcode. Warning: Unable to create restoration in progress marker file thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0) frame #0: 0x0000000000000000 error: memory read failed for 0x0 I run latest xcode version 15 and latest flutter and latest ios on my mobile. Is there any conclusion on how to fix this?