javax.servlet.jsp.jspException: com.atlassian.confluence.pages.persistence.dao.filesystem.AttachmentDataFileSystemException: Unable to move attachment
ERROR [http-bio-8443-exec-34] [atlassian.confluence.servlet.ConfluenceServletDispatcher] sendError Could not execute action
check folder permissions.
That suggests that there are one or more directories in <confluence home> on the server with the incorrect permissions.
You'll need to go on to the Confluence server and check and fix all the permissions and restart Confluence.
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