OdataLink Error Code 9999: Xero encountered an unknown error while servicing the request
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.