Since nearly two years, our main deployment model for custom applications is based on ZIP files. This deployment model is also the only deployment model supported by the SDK and has proven to be very robust and efficient. For this reason, we are retiring the "HTTP(s) proxy" option in the next sprints.
If you still have applications hosted using the "HTTP(s) proxy" option, please zip them and upload them using the "Upload ZIP file" option. To check how your application is hosted, click on the application in the administration application. If it reads "Repository" as "Type", convert it.
If you have any question or are uncertain how to convert an application, please contact us through this site.