gunicorn is not running

As i am following through the tutorial of

https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-20-04

gunicorn is not running

when i used the command sudo systemctl status gunicorn

my gunicorn.socket file

[Unit]
Description=gunicorn socket

[Socket]
ListenStream=/run/gunicorn.sock

[Install]
WantedBy=sockets.target

my gunicorn.service file

developer@ubuntu-s-1vcpu-1gb-blr1-01:~$ sudo nano /etc/systemd/system/gunicorn.service

GNU nano 4.8 
                                                /etc/systemd/system/gunicorn.service
[Unit]
Description=gunicorn daemon
Requires=gunicorn.socket
After=network.target

[Service]
User=developer
Group=www-data
WorkingDirectory=/home/developer/myprojectdir
ExecStart=/home/developer/myprojectdir/myprojectenv/bin/gunicorn \
          --access-logfile - \
          --workers 3 \
          --bind unix:/run/gunicorn.sock \
          bharathwajan.wsgi:application

[Install]
WantedBy=multi-user.target

error comes when i try to check the status of gunicorn by the command

sudo systemctl status gunicorn

Error:

gunicorn.service - gunicorn daemon
     Loaded: loaded (/etc/systemd/system/gunicorn.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Fri 2021-06-04 03:53:42 UTC; 48min ago
TriggeredBy: ● gunicorn.socket
   Main PID: 51351 (code=exited, status=1/FAILURE)

Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:     self.stop()
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:   File "/home/developer/myprojectdir/myprojectenv/lib/python3.8/site-packages/gunicorn/arbiter.py>
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:     time.sleep(0.1)
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:   File "/home/developer/myprojectdir/myprojectenv/lib/python3.8/site-packages/gunicorn/arbiter.py>
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:     self.reap_workers()
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:   File "/home/developer/myprojectdir/myprojectenv/lib/python3.8/site-packages/gunicorn/arbiter.py>
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]:     raise HaltServer(reason, self.WORKER_BOOT_ERROR)
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 gunicorn[51351]: gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 systemd[1]: gunicorn.service: Main process exited, code=exited, status=1/FAILURE
Jun 04 03:53:42 ubuntu-s-1vcpu-1gb-blr1-01 systemd[1]: gunicorn.service: Failed with result 'exit-code'.
lines 1-16/16 (END)