Error 143 - No session certificate was found as a tag or in the HTTP header
We are seeing this new error show up when doing GetCategorySpecifics calls and it is causing our platform to not be able to list onto eBay. We are not sure what the session certificate the request is expecting. We have not touch the code to this request which makes this error even harder to track down. It just started showing up randomly on all the request. Anyone has experience with this issue? Thanks in advance. We paid for premium support but would like to try our luck on the forms.