Seems to be a 3rd-party problem, see https://github.com/pbek/QOwnNotes/issues/664
400 Bad Request from proxy server
i set up davdroid like in the configuration example (http://demo.owncloud.org/remote.php/caldav/; demo user: test, password: test).
Nexus 4 on Android 4.4.4
Server: ownCloud 7.0; Example-Server on demo.onwcloud.org
The following log was created:
For further information do not hesitate to contact me.
Can’t reproduce this here. According to
D/ch.boye.httpclientandroidlib.wire(20646): http-outgoing-37 >> "Proxy-Connection: Keep-Alive[\r][\n]"you’re using a HTTP proxy that causes the problem.
Can you try without proxy? If it works, please check whether this is a proxy problem (maybe it doesn’t understand PROPFIND?) or a DAVdroid problem.
Any news on this?