I added " @{PROC}/[0-9]*/task/[0-9]*/stat r," to make it work. So it becomes:
owner @{PROC}/[0-9]*/cmdline r, owner @{PROC}/[0-9]*/io r, owner @{PROC}/[0-9]*/stat r, owner @{PROC}/[0-9]*/status r, @{PROC}/[0-9]*/task/[0-9]*/stat r,
I added " @{PROC} /[0-9]* /task/[ 0-9]*/stat r," to make it work.
So it becomes:
owner @{PROC} /[0-9]* /cmdline r, /[0-9]* /status r, /[0-9]* /task/[ 0-9]*/stat r,
owner @{PROC}/[0-9]*/io r,
owner @{PROC}/[0-9]*/stat r,
owner @{PROC}
@{PROC}