This Bug still exists in 4.5.0.18
I am pretty sure now, that the check for internet connection causes the problem.
Here you see a screenshot from backup menu when in my local lan:
You can see all nextcloud options are marked red.
Here you can see, what happens, when I configure a autobackup nevertheless:
It works! The same behavior on CalDAV Account on this nextcloud. Manual sync does not work, auto sync works. So it seems, as if there is no or an other kind of checking the internet connection.
Furthermore I tried the following. I connected to an AP, which was connected with the internet. Then I plugged the AP ethernet cable from internet to my local lan. Here we go:
In this case every backup options are available and are working as they should.
So again my request. Change the check of internet connection. Maybe you can ping a server through internet, but when you dont get an answer just ask the user “do you want to proceed because you are in a local lan?”.
BR
Lukas
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