Hi, I am having trouble with setting up drupal with a symbolic link. I keep getting this error

It is the first time I set up drupal, and I have following the steps from this webpage and im stuck on the final part of step 6. Which is

sudo ln -s /etc/nginx/sites-available/drupal /etc/nginx/sites-enabled/

it states it can not create a symbolic link

https://websiteforstudents.com/how-to-install-drupal-on-ubuntu-20-04-18-04-with-nginx-and-lets-encrypt/

thank you for your help!