I’ve been using Davx5 to synchronize contacts between devices through a Radicale server for years without any major difficulties.
Since the 19th of June (since the deployment of Davx5 3.1.1? I cannot confirm this), I’m not able to push updates from one of the devices to the Radicale server: I get a “412 Precondition Failed” error.
However, I’m able to get the updates from the other devices.
I do not have any issues on other devices.
I’m using Davx5 3.1.1-ose installed from FDroid on all my devices.
The device on which I encounter the issue is a Motorola Moto X Play, running Android 7.1.1.
On server side I have radicale 2.1.11-6 running on a Debian 10.4.
Can you please help me?