PleX update broke my reverse proxy configuration

Hello!
I have a PleX server on my home pc and I have a vpn to my home to access it trough private ip.
As I have a lot of services running, I installed Nginx, created a url for it, and started mapping.

The problem is:
All of my urls are under one single domain name, i.e., i access media.mydomain.com, it gives me a home page for my internal links, and when i click one, it redirects to media.mydomain.com/plex, and after the last update, plex isn't working anymore! It gives me all white screen, no errors on error.log or access.log on nginx side.
The only error i found is in console from the browser, it gives me this:

This error does not occur when I access through media.mydomain.com:32400 or locally with 127.0.0.1:32400

This is the current plex configuration. If someone has a light on what could possibly be wrong. I already tried to move the files to another folder and ask plex to repair it self, but that did not work.

I have to access through a single link (can't add a plex.mydomain.com)

And pardon for my bad english

location /plex {
            rewrite /plex(/.*) $1 break;
            proxy_pass http://localhost:32400;
            proxy_http_version 1.1;
            proxy_set_header Accept-Encoding "";
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $http_host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_redirect off;

            sub_filter '/web/' '/plex/web/';
            sub_filter_types *;
            sub_filter_once off;

        }

UPDATE 1:

After some research, I found the issue! The issue was nginx altering js and css files with the sub_filter directive, and it was raising a flag for SRI (Subresource Integrity). The solution was to sub_filter only html files, not js and css. To do that, i alter thje sub_filter_types *; to sub_filter_types html;

The final configuration is this:

        location /plex/ {
            rewrite /plex(/.*) $1 break;
            proxy_pass http://localhost:32400/web/;
            proxy_http_version 1.1;
            proxy_set_header Accept-Encoding "";
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $http_host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_redirect off;
            sub_filter '/web/' '/plex/web/';
            sub_filter_types html;
            sub_filter_once off;
        }

Hope that helps anyone out there!