# Can custom CSS cause an error when trying to upgrade?

**URL:** <https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867>\
**Category:** Self-hosting\
**Tags:** multisite\
**Created:** [March 6, 2019, 2:39pm UTC](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867 "2019-03-06T14:39:22Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![joshm](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/joshm/32/135134_2.png) [@joshm](https://meta.discourse.org/u/joshm)\
**Post date:** [March 7, 2019, 1:58pm UTC](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867/5 "2019-03-07T13:58:05Z")

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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]

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