Report ID 383267196

I am trying to back up to the zotero server from a standalone version on a Mac. I repeated get the following error. It looks like this only occurs when I try to back up PDFs stored in group libraries. Any suggestions?

------------------
[JavaScript Error: "Unexpected file registration status 500 (3621799_7GEFKZRA)" {file: "chrome://zotero/content/xpcom/storage/zfs.js" line: 580}]
onUploadComplete/Zotero.Sync.Storage.ZFS</<@chrome://zotero/content/xpcom/storage/zfs.js:580:6
_rejected@resource://zotero/q.js:897:24
when/</<@resource://zotero/q.js:924:30
reject/rejection<.when@resource://zotero/q.js:743:31
makePromise/promise.promiseDispatch@resource://zotero/q.js:563:26
defer/become/</<@resource://zotero/q.js:474:17
onTick@resource://zotero/q.js:163:17
setTimeout</setTimeout/<.notify@resource://zotero/q.js:78:7

[JavaScript Error: "An error occurred" {file: "chrome://zotero/content/xpcom/storage/zfs.js" line: 581}]
onUploadComplete/Zotero.Sync.Storage.ZFS</<@chrome://zotero/content/xpcom/storage/zfs.js:581:6
_rejected@resource://zotero/q.js:897:24
when/</<@resource://zotero/q.js:924:30
reject/rejection<.when@resource://zotero/q.js:743:31
makePromise/promise.promiseDispatch@resource://zotero/q.js:563:26
defer/become/</<@resource://zotero/q.js:474:17
onTick@resource://zotero/q.js:163:17
setTimeout</setTimeout/<.notify@resource://zotero/q.js:78:7
This discussion has been closed.