Group lib: "The attached file could not be found. It may have been moved or deleted"
I am getting quite often (but not always) "The attached file could not be found. It may have been moved or deleted" for PDFs in Group libraries. My groups have have File Editing enabled, are not public and use Zotero storage. I am owner of these groups (I have unlimited Zotero storage). Entries with files are added by different group members. Does it depend on how the group members are adding the files? I can see attachment name (on zotero.org or in zotero app). thanks