I'm running Nextcloud as DAV-Server and my Kontact sync only a part of my contacts. The only error message (debug is enabled!) is: > akonadi_davgroupware_resource[23488]: org.kde.pim.davresource: DavGroupwareResource::onMultigetFinished: Failed to parse item data. "https://example.net/remote.php/dav/addressbooks/users/user@example.net/default/6c1b296d-2409-44ae-9857-9c8c2de4ea0c.vcf" I downloaded the .vcf manually, content is (anonymized): > BEGIN:VCARD > VERSION:3.0 > UID:6c1b296d-2409-44ae-9857-9c8c2de4ea0c > X-EVOLUTION-FILE-AS:Doe\, John > FN:John Doe > N:Doe;John;;; > TEL;TYPE=cell:+49 163 1737743 > PRODID:-//ownCloud//NONSGML Contacts 0.4.0.0//EN > REV:2015-07-11T09:51:15+00:00 > END:VCARD KDE Plasma: 5.10.4 KDE Frameworks: 5.36.0 KDE Apps: 17.04.3
fixed with update to 17.08.0