An improvised latest version of https://www.slideshare.net/amandeepmidha/rfc-7807-communicating-the-problem

1) Across Technology, not just REST but (maybe SOAP) and gRPC too
2) Also I would like to take few examples from Microservices Management, E-commerce, Fintech/Banking, and Two-phase commit transaction examples where API Error Codes and Messages can do much greater job than present we are used to from API Developer point of view
3) If possible, participants to come prepared with their developed APIs and troubleshooting questions they faced in production