Report ID: 585997276. I'm getting an "error occurred during syncing" message stating that "Item MLRIZELA" is not found in my library. How can I clear this error?
We'll have to look into how this happened, but if you go to your My Library root and paste MLRIZELA into the Zotero search bar in All Fields & Tags mode, you should see the affected attachment item. When was it added? If you make a change to that item (e.g., assigning a tag), does the sync then go through?
You added a tag to the attachment or to the parent? Really any change to the attachment item itself should fix this. But there's no harm in deleting and adding again if you want to fix this quickly.
(If you don't see it, check in the Zotero trash.)