Apparent failure in syncing to Dropbox

Hi Mr. Noodle-
Just upgraded to v4! In reviewing my rules and logs, I noticed a sync job from my wife's machine to Dropbox is giving me an apparent error. Here's the relevant Log listing:
2016-05-04 11:40:22.556 hazelworker[61081] Processing folder Documents
2016-05-04 11:40:24.568 hazelworker[61081] knitting: Rule Sync Knitting Folder matched.
2016-05-04 11:40:24.973 hazelworker[61081] [Error] Could not sync file/folder: Could not sync file/folder at knitting to /Users/Marie/Dropbox/knitting.
The thing is, it seems to be syncing correctly. The sync rule is the same as your sync.hazelrules example.

Any idea what's up?
Just upgraded to v4! In reviewing my rules and logs, I noticed a sync job from my wife's machine to Dropbox is giving me an apparent error. Here's the relevant Log listing:
2016-05-04 11:40:22.556 hazelworker[61081] Processing folder Documents
2016-05-04 11:40:24.568 hazelworker[61081] knitting: Rule Sync Knitting Folder matched.
2016-05-04 11:40:24.973 hazelworker[61081] [Error] Could not sync file/folder: Could not sync file/folder at knitting to /Users/Marie/Dropbox/knitting.
The thing is, it seems to be syncing correctly. The sync rule is the same as your sync.hazelrules example.

Any idea what's up?