Client crash on Desktop Client Add folder Sync Connection


I keep having a client crash on adding a document folder from a windows 10 system. Strangely, rights are fully there for the user, and administrators, and system all have full control.

Expected behaviour

Add folder like others (Desktop, photos, etc all work fine)

Actual behaviour

Crash on adding new sync connection for document folder, can restart but need to add it again, still crashes.

Steps to reproduce

  1. Add user account - choose to add sync manually
  2. Add user documents folder
  3. link to folder on owncloud server and crash

Server configuration

Operating system: Centos 7.9.2009 (core)

Web server: Apache 2.4.6 with redis 3.2.12

Database: Mariadb 5.5.68

PHP version: 7.4.16

ownCloud version:

Storage backend (external storage):

Client configuration

Client version: 2.7.6 ( 3261 )

Operating system: Windows 10 - 20H2 ( 19042.867 )

OS language: English

Qt version used by client package (Linux only, see also Settings dialog):

Client package (From ownCloud or distro) (Linux only):

Installation path of client: C:\program files\Owncloud


04-05 21:29:33:113 [ info gui.account.settings ]: Folder wizard completed
04-05 21:29:33:113 [ warning sync.utility ]: “C:/Users/–REDACTED–/Documents//Desktop.ini” already exists, not overwriting it to set the folder icon.
04-05 21:29:33:114 [ info sync.utility ]: Creating favorite link from “C:/Users/–REDACTED–/Documents/” to “C:/Users/–REDACTED–/Links/Documents.lnk”
04-05 21:29:33:124 [ info gui.folder.manager ]: Starting the next scheduled sync in 0 seconds
04-05 21:29:33:129 [ info plugins ]: Created VFS instance from plugin “owncloudsync_vfs_win”
04-05 21:29:33:129 [ info sync.database ]: Detected filesystem “NTFS” for “C:/Users/–REDACTED–/Documents/.sync_cbf3877d4781.db”
04-05 21:29:33:130 [ info sync.configfile ]: Adding system ignore list to csync: “C:/Program Files/ownCloud/sync-exclude.lst”
04-05 21:29:33:130 [ info sync.configfile ]: Adding user defined ignore list to csync: “C:/Users/–REDACTED–/AppData/Roaming/ownCloud/sync-exclude.lst”
04-05 21:29:33:149 [ warning ]: Could not check for or unregister previous StorageFolder for “C:\Users\–REDACTED–\Documents” “Element not found.”
04-05 21:29:33:152 [ warning ]: Error registering StorageProvider for “C:\Users\–REDACTED–\Documents” “Access is denied.”
04-05 21:29:34:135 [ fatal default ]: CfConnectSyncRoot: C:\Users–REDACTED–\Documents error: WindowsError: ffffffff80070186: The operation is only supported on files under a cloud sync root.

How do you exactly add this new location? Could you post a screenshot?

Is the new location a locally mounted network volume? (VFS requires „real“ NTFS drive)

Could you post the crash ID?

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