Trying to delete or replace appIcon in my project's assets.xassets fails. After a few seconds xcode displays error "...couldn't be moved to the trash because the volume Macintosh HD doesn't have one." Needless to say the trash folder exists and works from Finder. The volume has 97G free space. I tried xcode's 'delete derived data' and 'clean build folder' and restarted xcode. Same behavior (deleting appIcon fails).