i am using nextcloud since the fork from owncloud. the carddav and caldav functions doesnt work or work some weeks ( caldav @ sailfisch OS e.g. )
now i got another mysterious malfunction in the lightning calendar app : if i use the direct ip link/url given by the share function in the nextcloud calendar the lightning integration works great. But the Web URL does work an there were no error messages in thunderbird.
nextcloud is reachable from the internet and in the webinterface everthing works fine. Also the caldav links ( web URL ) works in my sailfish OS mobile. Any idea why this works via weblinks for my mobile ( so webdav link and server configuration seems correct ) and not for Thunderbird ?