@logos88 According to the logs, the server says that there is no service. When sending a PROPFIND to https://sogo.uv.es/SOGo/dav, it returns a redirect (302 Found) to https://as.uv.es/cgi-bin/AuthServer?ATTREQ=sogo&PAPIPOAREF=47eea342dd3a01be67234b379622acb5&PAPIPOAURL=https%3A%2F%2Fsogo.uv.es%2FSOGo%2Fdav. When using this URL (which doesn’t sound like a CalDAV/CardDAV URL), it returns 200 OK (which is the wrong response for PROPFIND plus some HTML page.
I’d really appreciate if you could explain how this should be possible if there’s a CalDAV/CardDAV service at this URL.