Onlyoffice Document Server Help

Hello,
I followed the instructions from https://www.linuxbabe.com/ubuntu/integrate-nextcloud-onlyoffice to install onlyoffice document server on ubuntu.
the last step to test if onlyoffice is running i get to the following page as in the attachement and not “the server is running”
onlyoffice-document-server
onlyoffice
page

please help