Please note that there is a change that has to be performed on your side for continuing to submit reports via the API. 

(We've added a clarification to the released NewsFeed.)

In order to submit reports you must add /set/ to the URL:
https://www.wis-tns.org/api/set/bulk-report

The reply is obtained with /get/ in the URL:

https://www.wis-tns.org/api/get/bulk-report-reply 

Note that the file-upload and prop-period are called with set: /api/set/file-upload, /api/set/prop-period
whereas the Search and Get objects APIs are called with get: api/get/search, api/get/object
All these are specified in the updated manuals, available from the help page.

Sorry for having missed this clarification earlier, and thanks for your understanding.

Best regards,

The TNS team.