Unfortunately you updated the app to version 3.0.0 and shot all connections to (at least) nextcloud 11. According to logfile the login works:
{“reqId”:“SUml+GU6JIY2QoKjugq3”,“remoteAddr”:“188.193.244.YY”,“app”:“admin_audit”,“message”:“Login successful: "frank@ithnet.com”",“level”:1,“time”:“2018-02-11T14:02:38+00:00”,“method”:“POST”,“url”:"/ocs/v2.php/apps/notifications/api/v2/push?format=json&pushTokenHash=9646568dc2c20505b98b317bf3956c76a4d632c1eaa52b4ace3c0959fa40a0758cc6663f6137d39eae090bf8a72ef4e2d5fedf8e8e181092bf3410c78d461c14&devicePublicKey=-----BEGIN%20PUBLIC%20KEY-----%0AMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAiO8R5ovEN6zHs8%2F5phEr%0AwFj%2B03Gq%2BfKR6Yq4V3qNdqxuc%2F5yBClsejTJOaoCxAUbkM5VpitznRSFjwQESHvP%0ArxL3OISZepRBAJZLDq3FWV24WGLcXQFZPoN3m%2BqYIScQK6Q4IYGB%2F3bIvABhiav4%0A2fffGcSyywuiROPn4pjECZd6PPQ8PAqE%2Fl5jZpvibM9JuPGcbe%2F%2Bm1H8TVXAWTUh%0ALfOt8BKI2LdJeaBU9k4MmDtZZ3JCk78nYgV6C3Xw4mSM58C9b8aX6I1xPCJErbsK%0AipA7OG7ixCMAB%2F2pN1FGQzSEC1PSyEb3RSRFKT8VfJJWmBSkzjTFInDR0tA0HKwC%0AGwIDAQAB%0A-----END%20PUBLIC%20KEY-----%0A&proxyServer=https%3A%2F%2Fpush-notifications.nextcloud.com",“user”:"frank@ithnet.com",“version”:“11.0.5.1”}
But then:
{“reqId”:“sghjUlD/8F/aFr1yqZA6”,“remoteAddr”:“188.193.244.YY”,“app”:“webdav”,“message”:“Exception: {“Message”:“HTTP\/1.1 401 CSRF check not passed.”,“Exception”:“Sabre\\DAV\\Exception\\NotAuthenticated”,“Code”:0,“Trace”:”#0 \/srv\/user-local\/cloud.default\/owncloud\/apps\/dav\/lib\/Connector\/Sabre\/Auth.php(154): OCA\\DAV\\Connector\\Sabre\\Auth->auth(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#1 \/srv\/user-local\/cloud.default\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Auth\/Plugin.php(199): OCA\\DAV\\Connector\\Sabre\\Auth->check(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#2 \/srv\/user-local\/cloud.default\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Auth\/Plugin.php(150): Sabre\\DAV\\Auth\\Plugin->check(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#3 [internal function]: Sabre\\DAV\\Auth\\Plugin->beforeMethod(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#4 \/srv\/user-local\/cloud.default\/owncloud\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\n#5 \/srv\/user-local\/cloud.default\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(466): Sabre\\Event\\EventEmitter->emit(‘beforeMethod’, Array)\n#6 \/srv\/user-local\/cloud.default\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(254): Sabre\\DAV\\Server->invokeMethod(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\n#7 \/srv\/user-local\/cloud.default\/owncloud\/apps\/dav\/appinfo\/v1\/webdav.php(61): Sabre\\DAV\\Server->exec()\n#8 \/srv\/user-local\/cloud.default\/owncloud\/remote.php(165): require_once(’\/srv\/user-local…’)\n#9 {main}",“File”:"\/srv\/user-local\/cloud.default\/owncloud\/apps\/dav\/lib\/Connector\/Sabre\/Auth.php",“Line”:220,“User”:“frank@ithnet.com”}",“level”:0,“time”:“2018-02-11T14:02:57+00:00”,“method”:“PROPFIND”,“url”:"/remote.php/webdav/",“user”:“frank@ithnet.com”,“version”:“11.0.5.1”}
All from the same IP with the same account, 20 seconds later failed.
Why is that?