Site or Service Name:
Tue May 23 2017 16:00:00 GMT-0700 (Mountain Standard Time)
Issue Summary: Sandbox API users are getting the error "Internal error to the application" while using Trading API Calls such as AddFixedPriceItem\AddItem\ReviseItem\ReviseFixedPriceItem etc. and "Sandbox Keyset not available" from developer.ebay.com.
We are aware of this issue and actively looking into it.