i have the same problem even updating to the latest version still the same
Extraneous Property
Objects of this type do not allow properties named 'DC.date.issued'.
Share App ID Missing
The 'fb:app_id' property should be explicitly provided, Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog.
Parser Mismatched Metadata
The parser's result for this metadata did not match the input metadata. Likely, this was caused by the data being ordered in an unexpected way, multiple values being given for a property only expecting a single value, or property values for a given property being mismatched. Here are the input properties that were not seen in the parsed result: 'og:type, og:description, DC.date.issued'
