OdataLink Error Code 9999: Xero encountered an unknown error while servicing the request
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Error 9999 will be logged when Xero encounters an unknown error while servicing the request.
This may be caused by the following.
- Instability on the Xero servers.
- Corruption on your Xero data file.
- Xero being temporarily unavailable.
If this issue occurs, we recommend you contact us.