Error code 0x8004C59 during synchronization, especially with SSL/TLS 1.3-only servers. Root Cause: Version 4.5.59 was compiled before widespread TLS 1.3 adoption. It defaults to TLS 1.2 or older. Fix: Downgrade your CardDAV server’s minimum TLS version to 1.2, or install a compatibility shim that proxies requests from 4.5.59 to your modern server. Alternatively, backport OpenSSL 1.1.1 libraries (provided you recompile from source).
Reboot even if not prompted. The kernel-level sync filter requires a fresh boot. contacts 4.5.59
This article dives deep into what represents, why version specificity matters, how to manage this iteration effectively, and the best practices for maintaining data integrity across your contact management systems. Fix: Downgrade your CardDAV server’s minimum TLS version
SR-CONT-4559-01 Date: 2025-04-19 (evaluation date) Subject: Functional & Security Assessment of Contacts Application, Version 4.5.59 Product Type: Personal Information Manager (PIM) / Address Book Client The kernel-level sync filter requires a fresh boot
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Here is a more technical version
No regression in core functionality was observed during testing against a standard Nextcloud 28.0.5 instance.