Ebayomatic ebay marketplace account API disconnect

Please advise regarding the change required to keep the ebayomatic plugin functioning correctly based on the message form ebay below:

It has been 24 hours since the ebay marketplace account deletion/closure notification endpoint https://www.*************.com/accountclosureendpointebayomatic that your application registered for receiving marketplace account deletion/closure notifications stopped acknowledging with a HTTP status code indicating a success. As a result, we are marking your application as down and non-responsive.

You have 30 days to correct the marketplace account deletion/closure notification endpoint or replace it with a functional one. Failure to fix the account deletion/closure notification endpoint Notification URL will result in non-compliance and eventual deactivation of your application keys.