Unable to synch

I foolishly (for reasons that I think are not relevant) attempted to "Restore to Zotero server" and now cannot synch at all. The synch just goes on forever. At one point I got this error number: 1340407915

The problem is the same on both my computers.

I do have a backup Zotero folder.

What can I do? Thanks.
This discussion has been closed.