An Exception has occurred: javax/xml/Datatype/DatatypeConfigurationException

Hi,

I am trying to upload an app and getting following error. I have uploaded another app last month and got no error. But this time I am using same process but no luck.

Error while processing package 562234583.itmps

An Exception has occurred: javax/xml/Datatype/DatatypeConfigurationException

These errors come together at the stage of "Verifying assets with the iTunes store".

Is anyone else getting the same error or has any idea why is this happening?

Thanks.