hal_gpio: Operation not permitted fault cannot be solved

Print file information:
RUN_IN_PLACE=no
LINUXCNC_DIR=
LINUXCNC_BIN_DIR=/usr/bin
LINUXCNC_TCL_DIR=/usr/lib/tcltk/linuxcnc
LINUXCNC_SCRIPT_DIR=
LINUXCNC_RTLIB_DIR=/usr/lib/linuxcnc/modules
LINUXCNC_CONFIG_DIR=
LINUXCNC_LANG_DIR=/usr/lib/tcltk/linuxcnc/msgs
INIVAR=inivar
HALCMD=halcmd
LINUXCNC_EMCSH=/usr/bin/wish8.6
LINUXCNC - 2.9.4
Machine configuration directory is '/home/cnc/linuxcnc/configs/my-mill'
Machine configuration file is 'my-mill.ini'
INIFILE=/home/cnc/linuxcnc/configs/my-mill/my-mill.ini
VERSION=1.1
PARAMETER_FILE=linuxcnc.var
TPMOD=
HOMEMOD=
TASK=milltask
HALUI=
DISPLAY=axis
COORDINATES=X Y Z A
KINEMATICS=trivkins coordinates=XYZA
Starting LinuxCNC...
Starting LinuxCNC server program: linuxcncsvr
Loading Real Time OS, RTAPI, and HAL_LIB modules
Starting LinuxCNC IO program: io
linuxcnc TPMOD=tpmod HOMEMOD=homemod EMCMOT=motmod
Found file(REL): ./my-mill.hal
Shutting down and cleaning up LinuxCNC...
Removing HAL_LIB, RTAPI, and Real Time OS modules
Removing NML shared memory segments

Debug file information:
Note: Using POSIX realtime
Failed to register output pin collection
hal_gpio: rtapi_app_main: Operation not permitted (-1)
./my-mill.hal:4: waitpid failed /usr/bin/rtapi_app hal_gpio
./my-mill.hal:4: /usr/bin/rtapi_app exited without becoming ready
./my-mill.hal:4: insmod for hal_gpio failed, returned -1
2307
Stopping realtime threads
Unloading hal components
Note: Using POSIX realtime

cnc@raspberrypi:~$ groups
cnc tty disk dialout sudo audio video plugdev users input render netdev i2c bluetooth gpio spi