Invalid PID number "" in "/run/"

I am trying to obtain an SSL certificate with certbot and now cant seem to get it working because of an error. I can also no longer restart nginx and get “Job for nginx.service failed because the control process exited with error code. See “systemctl status nginx.service” and “journalctl -xe” for details.” Any help would be appreciated. (disclaimer I am very new to this so I’m not sure if this is a badly worded question so sorry in advance)

find / -name
show a detailed listing of any files found.
ls -l /run/

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