Error daemonizing celery in ubuntu 16.04 - celery

Question

I am trying to daemonize the celery worker for my django application. But I am facing the following error on checking celery status:
Starting Celery Service...
celery.service: Control process exited, code=exited status=127
Failed to start Celery Service.
celery.service: Unit entered failed state.
celery.service: Failed with result 'exit-code'.
The /etc/default/celeryd file code:
CELERYD_NODES="worker1 worker2 worker3"
CELERY_BIN="/usr/local/bin/celery"
CELERY_APP="djangoapp"
CELERYD_CHDIR="/home/djangoapp/"
CELERYD_OPTS="--time-limit=300 --concurrency=4"
CELERYD_LOG_LEVEL="INFO"
CELERYD_LOG_FILE="/var/celery/log/%n%I.log"
CELERYD_PID_FILE="/var/celery/run/%n.pid"
CELERYD_USER="nobody"
CELERYD_GROUP="www-data"
CELERY_CREATE_DIRS=1
The /etc/systemd/system/celery.service code:
[Unit]
Description=Celery Service
After=network.target
[Service]
Type=forking
User=nobody
Group=www-data
EnvironmentFile=-/etc/conf.d/celery
WorkingDirectory=/home/celery
ExecStart=/bin/sh -c '${CELERY_BIN} multi start ${CELERYD_NODES} \
-A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
--logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'
ExecStop=/bin/sh -c '${CELERY_BIN} multi stopwait ${CELERYD_NODES} \
--pidfile=${CELERYD_PID_FILE}'
ExecReload=/bin/sh -c '${CELERY_BIN} multi restart ${CELERYD_NODES} \
-A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
--logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'
[Install]
WantedBy=multi-user.target
I have been trying to solve it for the last one hour but I am unable to solve it.
Someone please explain to me the reason behind the error and how to solve it.