I installed my meteor app on my Ubuntu 16.04.2 LTS Server. My app itself is running fine but I wonder about the following message:
WebSocket connection to 'ws://myapp.tld/sockjs/790/fu9qi2bo/websocket' failed: Unexpected response code: 400
Since I also have Plesk installed to manage my apps, the app is running via Phusion Passenger that also runs behind an nginx proxy with default settings from Plesk.
I tried several nginx proxy settings, that I found on SO or other website but I only get the error message.
Someone here, who made it through?