2.07b "error processing uploaded data" when syncing

Hello, upgraded to new version, everything seems fine except sync. Am not using file sync, just the database sync.

error report: 1192048060

and message is

[JavaScript Error: "Error processing uploaded data (Report ID: 65adaed5)" {file: "chrome://zotero/content/xpcom/sync.js" line: 783}]

[JavaScript Error: "[Exception... "'Error processing uploaded data (Report ID: ea08f7e8)' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]"]

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