Letsencrypt/Nxinx Redirect Error

Hey everyone,

i tried installing Letsencrypt with Nextcloud with this Video:

Everything went fine but i'm not able to connect to Nextcloud in any way. Even trying to revert the steps didnt help.
I dont use duckdns, i registered my own domain at selfhost.de and tried to register the subdomain nextcloud.*.de there, but it doesnt seem to work.
Do i have to change the subdomain (A-Record) to another Ip eg. XXX.XXX.XXX.XXX:444 (Nextcloud port)?

Edit: now i get a 502 Error on my nextcloud.*.de and a "The website is currently being setup under this address." if i just try to connect to mydomain.de...

Thanks for your help!

Thank you for you response: it is configured like you said, the only different thing is instead of an IP it just says nextcloud at $upstream

edit: all sites just refer me to the index.html in the \www\ folder and i think that is the error. but how can i redirect them to the omv login page, nextcloud etc. ?

My nextcloud.subdomain.conf looks like this:

server {
listen 443 ssl;

server_name nextcloud.*;

include /config/nginx/ssl.conf;

client_max_body_size 0;

location / {
include /config/nginx/proxy.conf;
resolver 127.0.0.11 valid=30s;
set $upstream_nextcloud 192.168.2.110;
proxy_max_temp_file_size 2048m;
proxy_pass https://$upstream_nextcloud:444;
}
}

But i still only get the default index.html from nginx.
If you tell me what you need, i can post more configs or logs

This is the index.html i am seeing.

It's the same you find in \Letsencrypt\www

My default.conf looks like this:

# main server block
server {
listen 443 ssl default_server;

root /config/www;
index index.html index.htm index.php;

server_name *.mydomain.de;

# enable subfolder method reverse proxy confs
include /config/nginx/proxy-confs/*.subfolder.conf;

# all ssl related config moved to ssl.conf
include /config/nginx/ssl.conf;
# enable for ldap auth
#include /config/nginx/ldap.conf;

client_max_body_size 0;
location / {
try_files $uri $uri/ /index.html /index.php?$args =404;
}

location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include /etc/nginx/fastcgi_params;
}

i think the error is in the location section. nginx tries to find index pages from nextcloud and omv, but cant access them because it's in a docker or sth. But i dont know how to fix it.

I already did that.
This is what my code looks like. I blanked the domain name (if you could edit your post and delete it, that would be great, just to be sure...)

Ok, i did that, but still only the index.html from nginx.

Edit:
So i think i found the error, but i dont know how to fix it. It is a nginx configuration problem.
In my understanding, i created a docker image with /AppData/letsencrypt as root directory /config
So nginx is trying to redirec with

location / {
try_files $uri $uri/ /index.html /index.php?$args =404;
}

and is searching for omv's and nextcloud's index.php/index.html in /config/nextcloud (which would be /AppData/letsencrypt/Nextcloud, which doesnt exist) or /config/, because it uses the URI Nextloud, and doesn't even have an URI for OMV.
So i need to redirect it to the root Directory for Nextcloud and omv, which is outside the root path of the container.
How can i do that? Or am i wrong?

Thank you for your patient help!

Tried it again today, reinstalling everything, but still no luck... I am certain that I configure sth. wrong but I don't know what... I will have to wait I think...
Thank you all anyways

Update!
It works now! No idea why it didnt work before, but after reinsalling everything a dozen times, it works now. Thank you all for your help!

Hey these are my config files. What Problem exactly do you have?

Glad if I helped you