I was able to solve the issue. The issue was caused by an expired certificate and needed to be swapped out. I could gain access to the HTTP interface again by updating the nginx.conf file located in /etc/nginx/nginx.conf back to port 80 and restarting the service using sudo systemctl restart nginx command. Once I had access, I created a new certificate via the standard UI. Changing the certificate in Settings prompted the restart of the web UI, and everything was restored.
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