Hello,
In order to migrating our documents from another system to Confluence we wanted to use the webdav plugin for bulk import. But we are not able to create any files using it. We can create folders, but not files.

We followed the instructions detailled here : https://confluence.atlassian.com/doc/configuring-a-webdav-client-for-confluence-148044.html
We tried with Windows10 integrated webdav client both methods :
- Windows Network Drive
- Windows Web Folders
In both case we are able to reach the webdav and access to the spaces and subfolders, but not to create any files (using wether drag and drop or right-click/create). Windows is responding an error "0x8000ffff Unexpected Error"

We tried using a different webdav client (WinSCP) and encountered the same behaviour : we are able to access to the spaces, to create folders, but not to create any files. WinSCP is responding a 500 error.

Files we tried to create are txt, jpg, pdf, png,...
We connect on the webdav using an account which is members of confluence-administrators group.
We tried with disabling strict path checking and encountered the same behavior.
Logs are returning the following error message :
2023-09-27 17:32:22,364 ERROR [https-jsse-nio-8443-exec-8] [extra.webdav.resource.PageResourceImpl] addMember Unable to add/update attachment default/Global/REP/REPRISE HOME/Reprise Teamforge/Nouveau document texte.txt on page page: Reprise Teamforge v.3 (21069829)
-- url: /plugins/servlet/confluence/default/Global/REP/REPRISE%20HOME/Reprise%20Teamforge/Nouveau%20document%20texte.txt | traceId: c394bbd1792ee2b7 | userName: balanea
java.io.IOException: Permission denied
2023-09-27 17:32:22,367 ERROR [https-jsse-nio-8443-exec-8] [extra.webdav.servlet.ConfluenceWebdavServlet] service Unexpected error
-- url: /plugins/servlet/confluence/default/Global/REP/REPRISE%20HOME/Reprise%20Teamforge/Nouveau%20document%20texte.txt | traceId: c394bbd1792ee2b7 | userName: balanea
org.apache.jackrabbit.webdav.DavException
Does anyone has an idea of this behavior's cause ?
Thanks in advance for your help.