Server Error 404

I am using Service Studio 10.0,

I made an app and it runs nicely on Outsystems Now and Android apk (it's a simple offline app). Today I remade it, however, every time I opened it whether on browser or Outsystems Now, it returned 

Server Error

404 - File or directory not found.

The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

I wonder if this is problem of my app or it's just a temporary server error, and how to fix it. I attached my oml file.

I am not sure I post this in a correct forum.

Please help ! Thank you very much    

I have this issue in my account Development Environment Status:

Deployment service is down in front-end SERVER