The Logfile is full of this error messages. I can’t delete sometimes files with the nextcloud beta App for Android.
Also many login, logout messages in the log files.
Info admin_audit Login successful: "lars" 2016-11-03T21:31:39+01:00 lars
Info admin_audit Login attempt: "Lars" 2016-11-03T21:31:39+01:00 --
Debug no app in context Current user is not logged in 2016-11-03T21:31:25+01:00 --
Debug webdav Exception: {"Message":"HTTP\/1.1 401 Cannot authenticate over ajax calls","Exception":"Sabre\\DAV\\Exception\\NotAuthenticated","Code":0,"Trace":"#0 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/apps\/dav\/lib\/Connector\/Sabre\/Auth.php(155): OCA\\DAV\\Connector\\Sabre\\Auth->auth(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#1 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Auth\/Plugin.php(163): OCA\\DAV\\Connector\\Sabre\\Auth->check(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#2 [internal function]: Sabre\\DAV\\Auth\\Plugin->beforeMethod(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#3 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\n#4 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(446): Sabre\\Event\\EventEmitter->emit('beforeMethod', Array)\n#5 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(248): Sabre\\DAV\\Server->invokeMethod(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#6 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/apps\/dav\/appinfo\/v1\/webdav.php(60): Sabre\\DAV\\Server->exec()\n#7 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/remote.php(165): require_once('\/var\/www\/vhosts...')\n#8 {main}","File":"\/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/nextcloud\/apps\/dav\/lib\/Connector\/Sabre\/Auth.php","Line":248,"User":false}