I’m sorry if this question has already been asked, but after browsing this site (as well as the Thunderbird and GitHub sites) for a while, I couldn’t find an answer to my problem. I tried some stuff I found related to Thunderbird (something about the advanced configuration of Lightning and having to set a file on “false”), but it didn’t fix anything. So, here it is:
Since yesterday, I have a double problems of synchronization for my Nextcloud calendar. I use the latest version of Thunderbird and Lightning on my desktop (Ubuntu 18.04) and the latest version of Davdroid as well as the latest version of the Nextcloud apps on my mobile devices (Samsung Galaxy S7 and Samsung Galaxy Tab s2, both of which have the latest version of android that was available to them).
On the Thunderbird side, my calendar, which is normally synchronized with my nextlcoud calendar keeps deactivating itself, meaning that none of my events and tasks are showing up in Lightning. When I click on “properties” and click on “switch on this calendar”, as soon as a press “finish”, it re-deactivate itself. I tried to re-do a new connection between Lightning and my Nexcloud calendar, but as soon as it is set up, the calendar de-activates itself. The only way I can have my calendar is to download it from Nextcloud, import it into Lightning and then, the only way to have both the same calendar is to make changes in Nextcloud calendar, since the .ics sync is only one-way.
On my mobile device, also since yesterday, the connection between my Nextcloud calendar and Davdroid isn’t working anymore. So, I tried to re-set up the connection between the two by suppressing my account on Davdroid and making a new one with the same Nextcloud information. But this time, it tells me “No access possible to the CalDav or CardDav services”. I tried to re-set it up from the Nextcloud app settings, but I get the same result. It does so for both of my mobile devices. This means I can’t access my Nextcloud calendar from my mobile devices anymore nor add new tasks or events from there and have them synchronized with my calendar on Lightning.
As I rely a lot on my calendar and task management apps, this is a real problem for me. So, hopefully, someone can help me here! I thank you very much in advance!