Expected behaviour
First installation of Client on Windows11 should download Files from the server.
Actual behaviour
After some downloades files: “Server reports error reading folder ‘/’: Connection closed”.
After that no connection is possible again, after restart client “no kompatible Server found”.
Clients from Windows 10 Computers we use for 2 years are working properly. Only the new Win11 Computer has this behavior.
I tried removing client and .cfg File, reinstalles Client. I tried different lokal Synch folders, I tried system-Proxy and no Proxy, full download files and placeholder.
Admin has updated OwncloudServerInstallation and checked certificate.
We need some help please.
Client configuration
Client version: 3.2.1
Operating system: Windows 11
OS language: Deutsch
Installation path of client: C:/Program Files/ownCloud
Logs
ownCloud 3.2.1.10355 9724d6 Libraries Qt 5.15.5, OpenSSL 1.1.1q  5 Jul 2022 Using virtual files plugin: wincfapi windows-10.0.22621 ownCloud
23-04-20 09:31:16:604 [ info gui.application ]:	################## “ownCloud” locale: “de_DE” version: “ownCloud 3.2.1.10355 9724d6 Libraries Qt 5.15.5, OpenSSL 1.1.1q  5 Jul 2022 Using virtual files plugin: wincfapi windows-10.0.22621”
23-04-20 09:31:16:604 [ info gui.application ]:	Arguments: (“C:\Program Files\ownCloud\owncloud.exe”, “–showsettings”)
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	Translations directory path: “:/client/translations/”
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	UI languages: (“de-DE”, “en-US”)
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	Theme-enforced locale: “”
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	Enforced languages: QSet()
23-04-20 09:31:16:604 [ info gui.application ]:	Using “de_DE” translation
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	qtTrPath: “C:/Program Files/ownCloud/translations”
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	qtTrFile: “qt_de_DE”
23-04-20 09:31:16:604 [ debug gui.application ]	[ OCC::Application::setupTranslations ]:	qtBaseTrFile: “qtbase_de_DE”
23-04-20 09:31:16:604 [ critical gui.application ]:	Could not load qtkeychain translations
23-04-20 09:31:16:604 [ info gui.application ]:	Plugin search paths: (“C:/Program Files/ownCloud”)
23-04-20 09:31:16:604 [ info gui.application ]:	VFS windows plugin is available
23-04-20 09:31:16:604 [ info gui.application ]:	VFS suffix plugin is available
23-04-20 09:31:16:604 [ debug default ]	[ OCC::Logger::setLogRules ]:	“sync..debug=true\ngui..debug=true\n”
23-04-20 09:31:16:619 [ info gui.application ]:	VFS windows plugin is available
23-04-20 09:31:16:619 [ info gui.application ]:	VFS suffix plugin is available
23-04-20 09:31:16:619 [ debug gui.socketapi ]	[ OCC::SocketApi::SocketApi ]:	creating “//./pipe” true
23-04-20 09:31:16:619 [ info gui.socketapi ]:	server started, listening at  “\\.\pipe\ownCloud-Torsten”
23-04-20 09:31:16:628 [ debug sync.credentials.http ]	[ OCC::HttpCredentials::fetchUser ]:	user not set, populating from settings
23-04-20 09:31:16:635 [ info gui.account.manager ]:	Restored:  0  unknown certs.
23-04-20 09:31:16:635 [ info gui.folder.manager ]:	void __cdecl OCC::FolderMan::setSyncEnabled(bool) true
23-04-20 09:31:16:698 [ debug gui.activity ]	[ OCC::ActivitySettings::setNotificationRefreshInterval ]:	Starting Notification refresh timer with  300  sec interval
23-04-20 09:31:16:717 [ debug gui.updater ]	[ OCC::Updater::create ]:	QUrl("…)
23-04-20 09:31:16:730 [ info gui.application ]:	Tray menu workarounds: noabouttoshow: false fakedoubleclick: false showhide: false manualvisibility: false
23-04-20 09:31:16:730 [ warning default ]:	QString::arg: 1 argument(s) missing in %1 %2%7%8Qt Bibliotheken %3, %4%7verwenden die Erweiterung für virtuelle Dateien: %5%7%6
23-04-20 09:31:16:781 [ info gui.folder.manager ]:	Setup folders from settings file
23-04-20 09:31:16:781 [ info plugins ]:	Created VFS instance from plugin “owncloudsync_vfs_win”
23-04-20 09:31:16:781 [ info sync.database ]:	Detected filesystem “NTFS” for “C:/Users/ko-dr/ownCloud - …/.sync_journal.db”
23-04-20 09:31:16:781 [ debug gui.folder ]	[ OCC::Folder::checkLocalPath ]:	Checked local path ok
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA quick_check;” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “SELECT sqlite_version();” Try: 0
23-04-20 09:31:16:783 [ info sync.database ]:	sqlite3 version “3.36.0”
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA locking_mode=EXCLUSIVE;” Try: 0
23-04-20 09:31:16:783 [ info sync.database ]:	sqlite3 locking_mode= “exclusive”
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA journal_mode=WAL;” Try: 0
23-04-20 09:31:16:783 [ info sync.database ]:	sqlite3 journal_mode= “wal”
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA synchronous = NORMAL;” Try: 0
23-04-20 09:31:16:783 [ info sync.database ]:	sqlite3 synchronous= “NORMAL”
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA case_sensitive_like = ON;” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “DROP INDEX IF EXISTS metadata_parent;” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “DROP INDEX IF EXISTS metadata_parent;” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS metadata(phash INTEGER(8),pathlen INTEGER,path VARCHAR(4096),inode INTEGER,uid INTEGER,gid INTEGER,mode INTEGER,modtime INTEGER(8),type INTEGER,md5 VARCHAR(32),PRIMARY KEY(phash));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS metadata(phash INTEGER(8),pathlen INTEGER,path VARCHAR(4096),inode INTEGER,uid INTEGER,gid INTEGER,mode INTEGER,modtime INTEGER(8),type INTEGER,md5 VARCHAR(32),PRIMARY KEY(phash));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS downloadinfo(path VARCHAR(4096),tmpfile VARCHAR(4096),etag VARCHAR(32),errorcount INTEGER,PRIMARY KEY(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS downloadinfo(path VARCHAR(4096),tmpfile VARCHAR(4096),etag VARCHAR(32),errorcount INTEGER,PRIMARY KEY(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS uploadinfo(path VARCHAR(4096),chunk INTEGER,transferid INTEGER,errorcount INTEGER,size INTEGER(8),modtime INTEGER(8),contentChecksum TEXT,PRIMARY KEY(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS uploadinfo(path VARCHAR(4096),chunk INTEGER,transferid INTEGER,errorcount INTEGER,size INTEGER(8),modtime INTEGER(8),contentChecksum TEXT,PRIMARY KEY(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS blacklist (path VARCHAR(4096),lastTryEtag VARCHAR[32],lastTryModtime INTEGER[8],retrycount INTEGER,errorstring VARCHAR[4096],PRIMARY KEY(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS blacklist (path VARCHAR(4096),lastTryEtag VARCHAR[32],lastTryModtime INTEGER[8],retrycount INTEGER,errorstring VARCHAR[4096],PRIMARY KEY(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS selectivesync (path VARCHAR(4096),type INTEGER);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS selectivesync (path VARCHAR(4096),type INTEGER);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS checksumtype(id INTEGER PRIMARY KEY,name TEXT UNIQUE);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS checksumtype(id INTEGER PRIMARY KEY,name TEXT UNIQUE);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS datafingerprint(fingerprint TEXT UNIQUE);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS datafingerprint(fingerprint TEXT UNIQUE);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS flags (path TEXT PRIMARY KEY,pinState INTEGER);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS flags (path TEXT PRIMARY KEY,pinState INTEGER);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS conflicts(path TEXT PRIMARY KEY,baseFileId TEXT,baseEtag TEXT,baseModtime INTEGER);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS conflicts(path TEXT PRIMARY KEY,baseFileId TEXT,baseEtag TEXT,baseModtime INTEGER);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE TABLE IF NOT EXISTS version(major INTEGER(8),minor INTEGER(8),patch INTEGER(8),custom VARCHAR(256));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE TABLE IF NOT EXISTS version(major INTEGER(8),minor INTEGER(8),patch INTEGER(8),custom VARCHAR(256));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “SELECT major, minor, patch FROM version;” Try: 0
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::commitInternal ]:	Transaction commit “checkConnect” and starting new transaction
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA table_info(‘metadata’);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::tableColumns ]:	Columns in the current journal: QVector(“phash”, “pathlen”, “path”, “inode”, “uid”, “gid”, “mode”, “modtime”, “type”, “md5”, “fileid”, “remotePerm”, “filesize”, “ignoredChildrenRemote”, “contentChecksum”, “contentChecksumTypeId”)
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE INDEX IF NOT EXISTS metadata_inode ON metadata(inode);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE INDEX IF NOT EXISTS metadata_inode ON metadata(inode);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::commitInternal ]:	Transaction commit “update database structure: add inode index” and starting new transaction
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE INDEX IF NOT EXISTS metadata_path ON metadata(path);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE INDEX IF NOT EXISTS metadata_path ON metadata(path);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::commitInternal ]:	Transaction commit “update database structure: add path index” and starting new transaction
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE INDEX IF NOT EXISTS metadata_parent ON metadata(parent_hash(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE INDEX IF NOT EXISTS metadata_parent ON metadata(parent_hash(path));” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::commitInternal ]:	Transaction commit “update database structure: add parent index” and starting new transaction
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA table_info(‘uploadinfo’);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::tableColumns ]:	Columns in the current journal: QVector(“path”, “chunk”, “transferid”, “errorcount”, “size”, “modtime”, “contentChecksum”)
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA table_info(‘conflicts’);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::tableColumns ]:	Columns in the current journal: QVector(“path”, “baseFileId”, “baseEtag”, “baseModtime”, “basePath”)
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “PRAGMA table_info(‘blacklist’);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::tableColumns ]:	Columns in the current journal: QVector(“path”, “lastTryEtag”, “lastTryModtime”, “retrycount”, “errorstring”, “lastTryTime”, “ignoreDuration”, “renameTarget”, “errorCategory”, “requestId”)
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “CREATE INDEX IF NOT EXISTS blacklist_index ON blacklist(path collate nocase);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: “CREATE INDEX IF NOT EXISTS blacklist_index ON blacklist(path collate nocase);” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “DELETE FROM downloadinfo WHERE path=?1” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “DELETE FROM uploadinfo WHERE path=?1” Try: 0
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “SELECT lastTryEtag, lastTryModtime, retrycount, errorstring, lastTryTime, ignoreDuration, renameTarget, errorCategory, requestId FROM blacklist WHERE path=?1 COLLATE NOCASE” Try: 0
23-04-20 09:31:16:783 [ debug sync.database ]	[ OCC::SyncJournalDb::commitInternal ]:	Transaction commit “checkConnect End”
23-04-20 09:31:16:783 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “SELECT COUNT(*) FROM metadata” Try: 0
23-04-20 09:31:16:783 [ info gui.folder ]:	Creating “C:/…/Desktop.ini” to set a folder icon in Explorer.
23-04-20 09:31:16:787 [ debug sync.database.sql ]	[ OCC::SqlQuery::prepare ]:	SQL prepare “DELETE FROM blacklist WHERE errorCategory=?1” Try: 0
23-04-20 09:31:16:787 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	SQL exec: Estimated query: “DELETE FROM blacklist WHERE errorCategory=‘OCC::SyncJournalErrorBlacklistRecord::Category::LocalSoftError [2]’” Actual query: “DELETE FROM blacklist WHERE errorCategory=2” Try: 0
23-04-20 09:31:16:787 [ debug sync.database.sql ]	[ OCC::SqlQuery::exec ]:	Last exec affected 0 rows.
23-04-20 09:31:16:787 [ info sync.configfile ]:	Adding system ignore list to csync: “C:/Program Files/ownCloud/sync-exclude.lst”
23-04-20 09:31:16:792 [ debug sync.vfs.win ]	[ unknown ]:	Succesfully called AddFolderToSearchIndexer on “file:///C:\Users\ko-dr\ownCloud - …”
23-04-20 09:31:16:792 [ info gui.folder.manager ]:	Adding folder to Folder Map  OCC::Folder(0x28ecfb68010) “C:/Users/…”