Site or Service Name:
Fri Sep 20 2019 09:38:41 GMT-0700 (Mountain Standard Time)
UploadSiteHostedPictures Trading API call is giving back "Internal error to the application" (error code 10007). This is a known issue that eBay is actively working on.
The issue was resolved ~230PM PST, but due to a large backlog of transactions you may experience some latency and/or timeouts. This should slowly resolve itself throughout the day.