Collabora can't connect to Collabora online

I’m testing nexcloud 20.0.5 on 02switch (it’s a Beta). I’ve instaled Collabora and Collabora built-in Code server. But Collabora can’t connect to Collabora server.

i tried :

  • Use built-in CODE
  • Use your server with the built-in address :
    but none of them is working.

Thanks for help.