Implementation LibreOffice-Online Community Version in WebApp/DeskApp

Has anyone been running LibreOffice-Online in Community Version? I’m searching for an implementation in WebApp or DeskApp. My LibreOffice seems to be running. If i open


the following notification appears:


For example: how can i edit/view a Word-Dokument which has been attached to an email?

Documentation to LibreOffice-Online ( leaves this open.

I am thankful for every hint