Nextcloud federation, external webdav

Since 2 days I try to get an federation to work.
Nextcloud yunohost, nextcloud on webspace, nextcloud on a webuzo testserver.
The two on webspace/webuzo works.
I get a message that a federation was shared, but when I accept the federation
there ist no folder.

Can someone help me, or have tryed the federation with yunohost nextcloud?


I find the solution. The 2 nextcloud installations have the same main domain.
(other sub domain)
When I use another domain it works. I don’t know wy.