Openoffice and Webdav

I use OwnCloud, and in the LibreOffice function remotely Open / Save File.
After installing 15.0 (LO v., working with files on my owncloud was working. After updating to LO, access to owncloud no longer works.
Lo does not require a name and password, no error message appears.
windows version of O ( doesn’t have this problem (Win7 / 32)

I tried to run LO from the console, also no message does not appear. Then with --safe-mode with clean user profile, Webdav function does not works this way too …

So I degraded LO back to …

Can anyone confirm this behavior? I like see some LO log or so, but nothing I found.

Update after upgrade :

Now I upgrade LO to from (unoficial, experimental ) libreoffice repository and problem persists …