Radar Error Could not connect to SignalR, UI won't update

In Radar Nightly I am getting a warning in my system, “Could not connect to SignalR, UI won’t update” that leads to a fix for nginx (letsencrypt) HTTPS forwarding. I tried adding the text in the help doc to my radarr.subfolder.conf and it crashed my letsencrypt so I had to take it out. Where is this text supposed to go?

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $http_connection;

You should migrate to swag, and delete proxy.conf and nginx.conf and restart the container so they update.

Those lines are now included in the stock confs.