I set up a nextcloud on my ubuntu server and It’s running fine, bue I wanted to set a domain with docker so, as long as I’m not familiar with this, I followed a page saying what I needed to do.

Followed this: https://www.51sec.org/2020/11/28/easiest-way-to-deploy-your-own-nextcloud-with-your-own-domain-using-portainer/

The moment I came to docker to set up the Ningx1 container it gives me an error when I deploy it:
Request failed with status code 500.

It’s the first time I’m doing something like this, I tried to search but nothing resolved.