Can custom CSS cause an error when trying to upgrade?

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Hi David, I’m using a multisite installation. AFAIK only one container and database/app in the same container. Here is the relevant part of my app.yml

templates:
  - "templates/postgres.template.yml"
  - "templates/redis.template.yml"
  - "templates/web.template.yml"
  - "templates/web.ratelimited.template.yml"
## Uncomment these two lines if you wish to add Lets Encrypt (https)
  #- "templates/web.ssl.template.yml"
  #- "templates/web.letsencrypt.ssl.template.yml"
  - "templates/web.socketed.template.yml"  # <-- Added

I’m using nginx in front of discourse, here is the relevant part of my nginx.conf

server {
        listen 80; listen [::]:80;
        server_name example.com;
        root /home/my_name/example.com;
        client_max_body_size 8M;
        location ~ (/custom_static_content) {
                try_files $uri /$uri =404;
        }
        location / {
                proxy_pass http://unix:/var/discourse/shared/standalone/nginx.http.sock:;
                proxy_set_header Host $http_host;
                proxy_http_version 1.1;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
        }
}

I’m trying to upgrade from [v2.2.0.beta3 +26]