deploy dcl start to a server

[Bruguera-cbcat]

We are trying to put the stable version of the scene that we are working in our sever and we have a custom url and behind a nginx but when I connect to an instance of ´dcl start´ on another computer using a domain name it gives me this error in top of the loading screen in a red box:
Critical error

• The realm v1~ isn't available right now.
• Catalysts Contract could not be queried
• The realm v1~ isn't available right now.
• The realm v1~ isn't available right now.

And in the browse developer console:
WebSocket connection to 'wss:///?identity=MHhmYzViZDRmYWZmMzIxMjBmYWI4MzhlM2FhNTU0YWNmODcxMDQxOGRl' failed:
(anonymous) @ index.js:84
connectWS @ index.js:84
connect @ index.js:84
connect @ index.js:86
connect @ index.js:52
t.connectComms @ index.js:61
C @ index.js:61