Problem solved. It was the OpenTasks app.
SOLUTION: In the permissions settings of the OpenTasks app the option “Contacts” (in german “Kontakte”) has to be turned on.
Thanks for your help.
I updated Nexcloud server to version 14.0.3 and DAVDROID/TASKS is not syncing anymore with Nextcloud.
Please help, or let me know if this will be fixed soon.
DAVdroid is working with Nextcloud here fine. There are no known reasons why it shouldn’t work anymore. It’s probably a server problem.
Please have a look at https://www.davdroid.com/faq/how-to-debug/ and provide steps to reproduce, Web server and CalDAV/CardDAV server logs taken while the problem occurs, DAVdroid debug info (DAVdroid / Settings / Debug info) and verbose DAVdroid logs etc as described in [READ BEFORE POSTING] What’s required to diagnose a problem.
Thank you for your response. It helped me to track the issue which it is now resolved.
@paula Great, thank you for the update. What was the solution to your problem?
@devvv4ever For some reason after I updated Nextcloud, Davdroid was marking that it was syncing but Opentasks couldn’t connect properly and wasn’t registering any changes made on NC, and when adding a task with Opentasks, they didn’t upload to NC either.
What I did to start the troubleshot was to uninstall Opentasks and reinstall it. After that all worked fine:)